Getting paid for your art isn’t selling out. Selling out is forgetting why you started.

Money is not the part that corrupts anything. What does the damage is when you stop asking what you want to make and start reading the room every single time, until the work is really just a guess about other people. Being paid means someone valued your hours. Plenty of people you admire are paid and are still making exactly what they meant to make.

Charge for the next thing someone asks you for, even a small amount. Then check the honest question underneath. If you would still make it unpaid, nothing has gone wrong.