It's not your fault. Nobody has any money to spend on artwork commissions from anyone, that's why.

I dunno, I really do not know what to charge

That's a tough thing to give an answer to, unfortunately. I wish I could give you a good solid way to attract people to toss you money for a custom piece of art, but im just one commissioner, and I have no problem paying and tipping artists I go to. Not everyone can be or will be so generous.