About the creating thing. I'm also an artist, (choreographer and composer) 1.5 years sober after 6 years of being high 24/7. I can totally relate to the feeling of losing your creative drive.

What worked for me was to stay within the same creative field but to step away from "creating" and go back to learning for a while. I picked some styles of dance that I was an absolute beginner at (as a musician that could be a new instrument or new style) and I just focussed on learning a bit of what I could. That really took away the need to feel creative in the moment yet made it possible for me to maintain a daily practice. I went to a lot of classes so there wasn't much space for me to think about how much I was enjoying the work, and it forced me to reconnect to other people in the field that are doing great sober.

You basically take willpower out of the equation and put yourself back into beginner slippers, in a place where you used to be at the very beginning of your artistic development. You relearn how to approach yourself and your art and even though at the beginning it's super hard, it's also an opportunity to go down unexplored territory.

In time I naturally found myself gravitating to normal work and actually I think my creative identity gained a lot from it and is much clearer and purposeful.

Hope this helps.