There are no benefits to converting beyond the fact that you are serving as an example and teacher to the rest of the nations, and that your fate is tied to that of the Jewish people, who if are collectively righteous, are promised the opportunity for maximum spiritual growth. However, an extremely high degree of spiritual growth is available to gentiles who accept a Jewish conception of G-d and the universe without actually committing to Jewish law. As a Muslim, you're 99% of the way there. Allah is metaphysically identical to the Jewish G-d (excepting the Ash'ariyya and Sufis) with the only difference being that the Jewish G-d gave the law and stewardship of the law to the Jews, and that he did not send prophets after Malachi.
The Noahide Law (the minimum expected of Gentiles according to the law and tradition maintained by the Jews since the time of Noah) provides one with the capacity and right to fully serve G-d and earn eternal life just the same as any Jew. A righteous gentile spiritually outranks even a high priest if the gentile is wiser than the priest.
There are no material gains whatsoever, and in fact, there are several downsides. You are expected to be held to a higher standard than gentiles, and many things that are permitted to you as a gentile become forbidden as a Jew. Jews are expected to observe 613 commandments, gentiles only 7, 6 of which are "negative" commandments which don't involve actually doing anything; just not doing something which you as a decent human being weren't going to do anyway. If you're interested in learning about your obligations as a gentile, see Hilkhoth Melakhim uMilkhamoth Chapters 9 and 10. That's this linked page and the next. If you have any questions, please feel free to ask.