Out of curiosity, what other ways do you have to reach flow state? I honestly struggle to name even one. And definitely not one that would pay the bills.
If you think you are a terrible drawer, check out “Drawing on the Right Side of the Brain”.
Paying the bills? I could have mentioned proving a theorem related to an algorithm at work ... but LLMs are also helping there now. The best I can come up with is: reading a book related to my current projects.
Good luck with your search.