Ask HN: 10 years of recreational programming, what takes me to the next level?

Almost completely self taught. Was forced to take a VB + Matlab class for my chemical engineering degree, but I basically didnt show up to class. At that point I was already a programmer and would only do the homework/tests. 4.0, easy class.

Outside of that its been google + stackoverflow + tutorials.

Thats been great and I've completed a full stack app, working on my second using react-native. Doing python automation when I get tired of that.

What I'm looking for is something that I'm missing. I spent time reading wikipedia about OOP and I found that very interesting to put names to things Ive been working with for years. I dont know if this improved my skill much, but I only put a few hours into wiki.

What should I put resources into next? Goal is to spend either a few hours or ~week into something that can improve my abilities. I'm not even sure what my weak points are. Any suggestions?