I doubt if anyone here would claim to have everything worked out; but that doesn't mean that we have to just believe in Jesus, and resign ourselves to ignorance about everything else.
Yes, there are different "interpretations" of just about any doctrine that you care to name; however, the truth is there, in God's word, and he leads us into it. We need to have a firm grasp of, and faith in, the fundamentals of the faith, because there are many wolves in sheep's clothing.
1 Cor. 11:18,19 (MKJV)
18 For first of all, when you come together in the church, I hear that there are divisions among you, and I partly believe it.
19 For there must also be heresies among you, that the approved ones may be revealed among you.
Rom. 16:17 (WEB) Now I beg you, brothers, look out for those who are causing the divisions and occasions of stumbling, contrary to the doctrine which you learned, and turn away from them.
Jude 3,4 (WEB)
3 Beloved, while I was very eager to write to you about our common salvation, I was constrained to write to you exhorting you to contend earnestly for the faith which was once for all delivered to the saints.
4 For there are certain men who crept in secretly, even those who were long ago written about for this condemnation: ungodly men, turning the grace of our God into indecency, and denying our only Master, God, and Lord, Jesus Christ.
You mentioned Roman Catholicism; well, that is a pseudo-Christian cult, full of paganism and traditions of men. It's not a church at all.