I had two main takeaways from watching this interview with the cartoonist and musician James Kochalka.
Creativity compounds (knowledge builds on knowledge) so you'll probably find that some ways of thinking or skills overlap between the different activities.
And the second:
If you want to get better at something, do it every day, and work hard at getting better at it. That last bit is really important, simply repeating an activity isn't enough — you have to focus on improving to get better.