We happen to be in a similar situation, albeit I am currently a NEET so…
Depending on what is the #1 thing you like, you can always become a master of it and then move the expertise on other areas, as senseless and silly as this sounds!
I myself want to be a good non-fiction general writer and critic. So, assuming I ever become really good, I could always transfer my initial expertise into something else like food/recipe reviews, nature writing, etc. Therefore, in a similar vein, you should be able to master something first so it can be moved to another interest.
To add, looking at what you listed, you can always master geometry per se by creating art first, and then, as you get other skills, you can move this to create visual music you composed with beautiful colors thanks to the color theory you learned while mastering art.