Is it possible for gentiles to become Jews?

I have recently come to the realization that the New Testament and Christianity itself is riddled with discrepancies and outright untruths (to say it kindly). Reading your website has been a real eye opener for me because I was raised
in the Christian faith and took as the “gospel” (no pun intended) their one-sided, misinterpretation of the Old Testament scriptures regarding the Messiah. Up until now, I just took it for granted that the New Testament referrals to Old Testament scriptures were accurate and true.