I'm afraid I don't have extensive knowledge about art courses, but I recall hearing about an online school that offered some programs in that general area. You could perhaps look at their website at
https://elvtr.com/course/technical-art - from what I vaguely remember, they should have information listed about the specific art-related courses they provide. You'd have to explore the details yourself, but it may be worth checking out as you research training opportunities. Just a thought based on something I came across before, but I can't personally vouch for the quality of their offerings. I'd suggest looking into it further if an online option for art education interests you.