If I may set aside my Catholic glasses for a munite and read the question as such, I see one issue with a “Bible only” approach. Sooner or later, there will be a question that is not in there. For example, human cloning. The Bible has nothing to say about it. Nada. So now what?
Now, if I may put my non-denominational glasses on, I think that you are on the right track. There may still be issues, but pray about them and God will lead you to all truth. Be aware that some may disagree with what you feel is correct, but you are entitled to it as much as they are.
If I put on my mainline Protestant glasses, come on in, the water is fine. We have already fleshed out some of the questions that you may have. Yes, it is Bible only, but if it is not in the Bible, we can come to a conclusion based on what we think it might say if it had been in there. Again, God will lead us to all truth.
If I may return to my Catholic (and E.O.) glasses, you are missing out on a lot by ruling out the 2,000 years of those before you. We have beautiful understanding of things from mystics and poets and theologins. We can answer almost any question calling upon the teachings of the Church and the Bible together. It is a fuller truth that we posses. We have no doubt that God leads us to the truth.
For your other question, God will judge you on how you act upon the grace he gives you for your salvation. Continue to study and search, and do not close any doors on your own.