For writing, practice writing short stories using writing prompts (I normally use Reddit’s /r/writingprompts but I’m trying to find an alternative here) and post them on the thread even if they suck. The commitment is low since it’s a short story and you can afford to twist the story to match your writing style rather than the other way around. You’ll also get votes and feedback from other members.

I started drawing as a kid, stopped for a while, and got back to it in my teens since I started doing a lot of writing then and wanted to visually depict what was happening as well. One thing that helped me a lot was to not look at other people’s art or photographs but rather solely work with what you’re visualizing in your mind and reiterate (with many many strokes) until the quality becomes acceptable. Use pencil and sketch with short and light lines. The point here is to develop your own intuition for perspective, splitting an object into basic shapes, and so forth.

I’ll also add that it’s extremely important to create your own style both for writing and drawing. Make your stuff look good, but always keep in mind that it’s fine to have your own quirks and distinctions. E.g. if your lines are a bit sketchy or if your circles aren’t perfect that can easily be part of your style.