Thinking about doing commissions

Because I'm a poor soul that's financially destitute. Only I have no idea where to even begin. I really want to get back into drawing though. I typically do digital, but would be down to do traditional as well. And I also figure, why not try to make some dough while doing it? Plus I'm still waiting for my friend to pay me back, and it's going much slower than I originally told it would and I don't want to nag her for the money. Therefore, doing commissions sounds like a good idea. I just have no idea where to even begin.

Also in case it's not blantaly obvious, I'm not planning to sell artwork for actual money on here, nor am I advertising anything. That's something I would probably do on my Instagram anyways. I'm merely just thinking out loud, and in a way seeking advice on how to go about doing commissions. Such as what pricing and to set.