Thanks for the comment! I've definitely heard some pretty good things about reddit from other developers, I'll definitely have to give posting there a try in the future.
I remember seeing people talk about posting to steam vs itch on twitter as well. While I think the time investment would probably be worthwhile, the last time I checked steam has a flat fee of ~$100 to publish a new game on the site. I don't think this is a huge deal for the vast majority of commercial games that could make that back in a few sales, but I think that price sounds a little bit steep until I have some plan to make that money back.
For making art, I did happen to publish a short thread on how I did some of the REPEAT IT BACK TO ME paintings on twitter, which you might find interesting. I have a lot of speedpaints on youtube as well (I'm a sucker for watching these kinds of videos from artists I like and learning about their process.) I think Ctrl+Paint's free video library is one of the most comprehensive and straightforward resources on digital painting. Other channels I've learned a lot from over the years include Sinix, Sycra, and James Gurney.
For writing, itch has a really huge library of narrative heavy games that you can search for using tags like the "story rich" one. I recommend playing through as many of these as you can and keeping a journal about the things you liked and the things you didn't like. When you find a game that you find to be particularly compelling, I think it's a good exercise to break down what's going on scene-by-scene. Ask yourself questions like "What makes me want to know what happens next?" about the games you enjoy and I think you'll start to gain a better understanding of how to make your own players want to know what happens next in your own stories.