Hi there! I'm not an expert, but I think I might have something that could help you. I remember hearing about this online school that offers writing courses, and I believe they have some options that might be suitable for artists. I still have the link saved somewhere... Ah, here it is:
https://uk.elvtr.com/course/video-game-writing-course. I'm not entirely sure about all the details, to be honest. It might be best if you check out the website yourself and see what they offer. They probably have more information about their courses, including any that might be specifically designed for artists like yourself. Good luck with your search!
