Re: People want me to do paintings for them.
I am, by no means, an effective or accomplished artist, but have been asked to paint for others. With few exceptions I let them know I don't feel I'm up to the project they want. No one has gone away angry.
On the other hand, if I feel I can do a credible job, I accept the commission (only twice in 20+ years) and set a price and terms. Both prospective clients agreed to prices, but did not want to agree to the terms - that I retain all copyrights. What can I say? 🤷♂️
You probably know what you're capable of - go with that.
Practice religion freely and freedom religiously.