Just to try to “re-rail” this discussion for a moment. Some understanding and belief of the Church’s teachings is a gift as a result of following Christ if he is leading you toward the Church.
What it comes down to is, either the Church is what she says she is, or not. The Church says she is a body that was founded by Christ and is led by the Holy Spirit to keep from defnintively teaching error in faith and morals. If this is correct and you disagree with the teachings of the Church, you are not arguing with the Church, but with the Holy Spirit. As a result of the grace received from the sacraments, you may come to see that the Church is correct. In any case, your obedience to them will help you to grow in virtue.
If the Church is not what she says she is, I can’t see any reason for joining. (There may be reasons, but I don’t know them.)
The Catholic Church is not like a Protestant denomination. I attended a wide variety of Protestant churches for more than a decade. When you are looking for a Protestant church to join, you look to see how well it suits you. Do you agree with its public teachings? Do the sermons help you to grow in your relationship woth God? Does it have the kind of worship service or liturgy that you are comfortable with? Do the members of the church seem like people with whom you would like to fit in? I am not condemning choosing this way. I did it myself and it seems to me the best way of choosing a Protestant denomination.
However, if you believe that the Catholic Church was founded by Christ and “the gates of Hell shall not prevail against it,” then you have to take the Church as she is, and to some extent consider whether you will be able to make yourself suit her. If you want to increase in holiness (and be a good and faithful Catholic), you will have to try to believe as she teaches (although you don’t have to succeed since that isn’t entirely in your conscious control). And you will have to act as if you believe. So for example, you don’t have to believe that homosexual behavior is wrong, but you have to learn why the Church says it is wrong and try to accept it on faith. And you can’t, e.g., vote in favor of “gay marriage.”
But the thing is, that most Protestants, and quite a few Catholics as well, don’t know what the Church actually teaches. I’d suggest getting a Catechism and reading a little bit at a time, all the way through. You’ll probably find quite a few surprises. You definitely do NOT have to believe all that you think the Church teaches when you start learning about the Church. Partly because as I said before, some of that may come through the grace of the sacraments later, and partly because you are probably to some extent misinformed about what the teachings are.
But if you think the Church might be what she says she is, find out what the teachings really are, and pray to find out what is really true, e.g., “Jesus, I don’t feel that contraception is wrong. Please lead me to understand the truth about it, whatever that may be.”
God bless you on your journey!