If I were you, I would not convert to Judaism. I come from a Jewish background (unbeknownst to me for years), and Yeshua did not have me find out until I was secure in the Messianic Jewish (Jewish Christian) faith (and Christianity is a Jewish sect that derived from Essenism, which is with what John the Baptist was affiliated).
In Judaism, you have to keep 613 laws. Concerning the Moabites, for example: "4 An Ammonite or a Moabite shall not enter into the assembly of the LORD; even to the tenth generation shall none of them enter into the assembly of the LORD for ever; 5 because they met you not with bread and with water in the way, when ye came forth out of Egypt; and because they hired against thee Balaam the son of Beor from Pethor of Aram-naharaim, to curse thee. 6 Nevertheless the LORD thy God would not hearken unto Balaam; but the LORD thy God turned the curse into a blessing unto thee, because the LORD thy God loved thee. 7 Thou shalt not seek their peace nor their prosperity all thy days for ever."
Yet there are other mitzvot, or laws, which state, "Thou shalt not hate thy brother in thy heart; thou shalt surely rebuke thy neighbour, and not bear sin because of him. Thou shalt not take vengeance, nor bear any grudge against the children of thy people, but thou shalt love thy neighbour as thyself: I am the LORD."
In light of those seemingly-contradictory mitzvot, the New Testament states the following (See Romans 7:4-25 for context.):
"13 Has then what is good become death to me? Certainly not! But sin, that it might appear sin, was producing death in me through what is good, so that sin through the commandment might become exceedingly sinful. 14 For we know that the law is spiritual, but I am carnal, sold under sin. 15 For what I am doing, I do not understand. For what I will to do, that I do not practice; but what I hate, that I do. 16 If, then, I do what I will not to do, I agree with the law that it is good. 17 But now, it is no longer I who do it, but sin that dwells in me. 18 For I know that in me (that is, in my flesh) nothing good dwells; for to will is present with me, but how to perform what is good I do not find. 19 For the good that I will to do, I do not do; but the evil I will not to do, that I practice. 20 Now if I do what I will not to do, it is no longer I who do it, but sin that dwells in me."
The point is that we were willing to, in this case, hold a grudge against the Mo'avim and Amonim; and Yehovah knew that. That's why He gave us over to that sin.
Yet, if you convert to Judaism, you will have to follow
logic like this:
"Whereas certain other nations are allowed to marry into Judaism (if they have converted) after a certain number of generations, when it comes to men from Amon and Mo’av descent, the Torah rules that no such people are ever allowed to marry Jews (23:4). Why are they given such harsh treatment? The pasuk (23:5) tells us that this ban is due to the fact that they hired Bilam to try and curse us, as well as the fact that they did not allow us to pass through their land to go to Eretz Yisrael; they did not greet us with food and drink. But why does this mean that they get harsher treatment than the Egyptians, for example, who can join our ranks after three generations? The Ramban (23:5) explains that these two nations (Amon and Mo’av) were expected to act kindly to us. For generations ago Avraham Avinu saved Lot (the father of both these nations) from captivity, and as such these two nations should have been grateful to us and should have aided us. But since they spurned Avraham’s kindness and exhibited a lack of gratitude, they showed themselves unworthy of joining the Jewish ranks - for a Jew’s life revolves around gratitude. The first word of the day we say is thanks (modeh), and the word yehudim comes from the word hoda’ah, which means to thank. Indeed, such is the centrality of this trait of gratitude, that the reason the Torah gives for eventually allowing Egyptians to join the Jewish fold is because (23:8) we were hosted in their land. Yes, they treated us harshly for two centuries, but (before that) they hosted us in their land and provided us with food when famine had hit Eretz Yisrael. Even for this we are to show a degree of gratitude."
On the other hand, you could become a Karaite Jew; but I already laid out what Romans 7:5-24 says, and Karaites do not believe it. So,
"Now therefore fear the LORD, and serve Him in sincerity and in truth; and put away the gods which your fathers served beyond the River, and in Egypt; and serve ye the LORD. 15 And if it seem evil unto you to serve the LORD, choose you this day whom ye will serve; whether the gods which your fathers served that were beyond the River, or the gods of the Amorites, in whose land ye dwell; but as for me and my house, we will serve the LORD.'"
The rabbis treat themselves as gods. In
Bava Metzi'a 59 of the Talmud, for example:
Why [the oven of] 'Aknai? — Said Rab Judah in Samuel's name: [It means] that they encompassed it with arguments2 as a snake, and proved it unclean. It has been taught: On that day R. Eliezer brought forward every imaginable argument,3 but they did not accept them. Said he to them: 'If the halachah agrees with me, let this carob-tree prove it!' Thereupon the carob-tree was torn a hundred cubits out of its place — others affirm, four hundred cubits. 'No proof can be brought from a carob-tree,' they retorted. Again he said to them: 'If the halachah agrees with me, let the stream of water prove it!' Whereupon the stream of water flowed backwards — 'No proof can be brought from a stream of water,' they rejoined. Again he urged: 'If the halachah agrees with me, let the walls of the schoolhouse prove it,' whereupon the walls inclined to fall. But R. Joshua rebuked them, saying: 'When scholars are engaged in a halachic dispute, what have ye to interfere?' Hence they did not fall, in honour of R. Joshua, nor did they resume the upright, in honour of R. Eliezer; and they are still standing thus inclined. Again he said to them: 'If the halachah agrees with me, let it be proved from Heaven!' Whereupon a Heavenly Voice cried out: 'Why do ye dispute with R. Eliezer, seeing that in all matters the halachah agrees with him!' But R. Joshua arose and exclaimed: 'It is not in heaven.'4 What did he mean by this? — Said R. Jeremiah: That the Torah had already been given at Mount Sinai; we pay no attention to a Heavenly Voice, because Thou hast long since written in the Torah at Mount Sinai, After the majority must one incline.5
R. Nathan met Elijah6 and asked him: What did the Holy One, Blessed be He, do in that hour? — He laughed [with joy], he replied, saying, 'My sons have defeated Me, My sons have defeated Me.