I’m going to link back to another post that aggregated some links from a similar set of questions.
But my primary advice is don’t stress yourself out trying to learn everything at the outset identify what the fundamentals are for where you want to end up. If you want to do programming, math, logic and some basic coding skills are the best ways to be able to hit the ground running.
If long term Tech-Art is place you want to be, you’ll need to work some time in there to actually learn you some Art skills. You don’t need to go deep on these, but you’ll want to go fairly broad, basically be an aggressive dabbler, this serves you well because 1) you’ll understand the existing pipelines and workflows well enough to identify spots to improve and 2) it allows you to learn the language, so that you have a common ground when speaking to your eventual customers (artists).
But most importantly what you want to cultivate for yourself is the ability to learn in the first place. Because one thing I’ve found in my decade+ of TA work is that I am constantly put in a situation where I have to learn a new task, a new tool or a new codebase.