Considering Doing Commission Work on Twitter, Any Advice?

I am in desperate need of increasing my income from online sources as I will be leaving home and traveling over the US East Coast for the next 4 to 8 months, or possibly longer depending on family drama. Possibly forever. Anyway, I see a lot of webcomic artists on Twitter that have "Commissions Open" and "Commissions Closed" in their name. Just wondering if anyone here has any experience with doing random commission work for strangers on social media.

I figure I need to put up a page somewhere that shows my rate sheet for single-character, multi-character drawings. I have two styles of drawings that I've been doing predominantly lately, just because I've been trying to come up with a style that is different from others.

The first is my "ribbon" style art. Basically: "What if Ty Wilson did comics." These are really quick for me and I wouldn't charge much (but not too LITTLE). Those look like this.

My other style is more like an oil painting, or "What if Monet did comics." These take about 20 hours to complete, so I can't see trying to sell commissions for a reasonable amount of dollars. But who knows, maybe someone would be willing to shell out... $300?
Here's some samples.

I welcome any advice or suggestions or warnings or insights.

Ooh, edit. Forgot to add this: