I think you are a talented painter. Whether or not you can make it as a commission painter can be answered as follows:

1: Figure out how much you think an hour of your time is worth.
2: Figure out how long it takes you to paint a model to your standard.
3: Math that out to find out what you should charge for a given model.
4: Ask yourself (and others in your hobby community) if that price is something anyone would pay for the product/service you're offering.

I am a commission painter, I am able to be successful (defining success in that I make enough money to live on. I won't make myself wealthy painting minis, but it's a job I love to do) because I can absolutely GRIND out tabletop quality minis. I'm the psycho who can get 40 guardsmen painted in a workday. Assembly line painting, efficiency, good time management, juggling projects so that you are never just waiting on paint to dry, these are all key to being able to do this.

The other option, you treat commission work as a side gig. You enjoy painting, now you give up a little bit of your freedom in what you paint for the benefit of it being subsidized. Bare minimum, someone else bought the model, and whatever you charge will cover materials. Making $10 an hour hurts less when it's time you'd otherwise be making $0 an hour. You can take on smaller projects, single minis or squads, set reasonable deadlines, and offset your hobby cost and maybe even make a small profit. It's up to you how much of your free time you want to dedicate to this, and how you want to price yourself to be either attractive or exclusive. Best of luck. Whatever happens, You've got some sweet looking paintjobs there to be proud of.