Ways to make yourself stand out in the “AI” field?

There's a lot of demand going on right now in the vaguely related fields of Data Science/AI/ML. There is a lot of confusion as well.

Currently as a 15-year-old in the middle of all of this, already having a decent background in programming, and being interested in pursuing this field, I'm not sure what to do.

It's become increasingly clear to me that the MOOCs I've done earlier have delivered only a superficial understanding of this field, and no mathematical intuition or understanding. So now I'm stuck.

I need a way to build up my skills today so that I don't end up becoming just one among millions tomorrow. What resources would you suggest for me to:

1) Build up the correct math background

2) Focus on the correct areas of CS

3) Get an understanding of the rest of AI with that knowledge without using a MOOC

4) Find other skills that you think might help me or anyone else stand out

Help in any of these would be greatly appreciated.

I know this is kind of umbrella, but I'm hoping I can catch a few good books and/or courses that'll help me get an idea of what I'm supposed to do.