Whether going full time or part time pro or as a money making hobby, here is a link to some great advice from Paul Elwood.
The art of making music is one thing and is what so many musicians embrace. The part so many can neglect or avoid is the hustling and promoting part. That is the part that will allow you to make some dollars with your craft. Paul is a terrific marketer. It would behoove anyone to not just read but heed these words of advice. https://paulelwood.com/thinking-of-going-pro/