If you're getting such good results in just 9 rolls worth of experience you are making wonderful progress. We all make mistakes. Those more experienced than me have made more of them, I still have to make them as I catch up. And the more issues you discover, analyze, and fix, the better you get.
As to your question regarding overexposure when wet printing, it'll actually be easier to print through a dense negative using an enlarger, than it is to scan one, at least today.
Stay with it, you're doing very well.