Sounds like you got all kinds of good advice and made lots of progress already. Let me propose one challenge for you: go nuts on a roll and try to overexpose and develop to the point that your highlights block up i.e. that you lose detail in the thickest portions of the neg. Just try to do that, it's very surprising how much b&w film can take! After that you can compare the detail you see on in your neg on a light table with a loupe... to the detail you can actually put onto paper. Then you are ready to start thinking about optimizing your exposure and development together... and/or learning printing tricks like split grade.
