[thinkingkong]

I would encourage you to put the idea of building a startup aside and just learn / have fun building things with no business utility first.

1. It sounds like you're already really curious so you've got your number one skill taken care of. If you're looking for a curriculum, start with something you're interested in and find the fastest, tightest feedback loop. Basically you want to be able to make something that activates all the reward centres in your brain or build it in small increments so you stay engaged. That might be learning how to write 3d graphics, build a website, basic javascript, etc. Find the smallest piece and just learn that.

2. Don't worry about doing everything "the right way". The whole point here is to try something, get a feeling for it, and then figure out how to make it better, how to write it differently, etc. You're going to end up realizing that one persons "best practices" are better than other peoples "best practices" and where you can make trade-offs (no1 skill imo)

3. As far as things to learn, that list is never ending. Just learn whatever you need to accomplish your goal.