I veiw myself as Catholic and I was baptised as a baby but I was adopted and raised Jewish. I did not agree with the Jewish teachings (not that there's anything wrong with being Jewish it's just not right for me) anyway how do I find out where to take classes so I can have my first communion and confrimation? DO I go to my church and ask my preist? Also I feel sort of stupid cause I'm 23 and probably the oldest one in the class, or do they have classes for adults?
I was confirmed a Catholic some 20 years ago, am of Jewish descent, and am heavily, heavily, heavily involved in relations between the Catholic church and the Jewish and messianic Jewish communities. If I told you, I'd have to shoot you.

I think your question is a VERY IMPORTANT ONE.
May I ask what it is about mainstream Judaism that you think is incompatible with Catholicism, other than the obvious (that the Orthodox, Reform, and Conservative do not accept Jesus as Messiah)????
There are many Catholic Jews who are observant of their covenant. They may be considered apostate by the non-messianic Jewish community at large, but they ARE still Jews, and as St. Paul says, "the gifts and calling of G-d are IRREVOCABLE." Too many have assimilated -- they have forgotten they are Jews and act like gentiles. But many look to all 613 mitzvot, as one friend of mine said, wearing their kippahs and tzitzit to mass.
You said you were raised Jewish, so my assumption is that you are a Jew. Please understand that if you are confirmed as a Catholic, you will nevertheless remain a Jew as well. You will always be one of God's chosen people!
You believe in Christ? So did Paul. So did James. So did all the apostles. And they were all Jews -- observant Jews, both Ekklesia AND Israel. The Jewish believers were "zealots for Torah" as James described them.
That you have come to understand Yeshua is Lord and Messiah is wonderful!!!! That you are baptized into Ekklesia is perfect!!!! But I hope you feel free... no, I ENCOURAGE you... to say the Sh'mah as well as the Creed, to recite the Kedushah as well as the Sanctus, to sing Oseh Shalom as well as Agnus Dei, to keep Shabbat as well as the Lord's Day, to remember that you are of Israel as well as of Ekklesia.
Please feel free to PM me! I lurk here, but not all the time.
Shalom