35-year-old here, with a similar box of CS knowledge floating around. Comfortably sub-million, but with a nice house and a couple dogs.

You really aren't obliged, and you don't really need to "make some money" out of it. More money would be nice, don't get me wrong. But you said you learned it because you enjoyed it. Which I did, too. I got my money's worth out of the learning.

You are not obligated to financialize everything you enjoy. It's super important to understand that.

The mortgage anxiety--I get that too. YMMV, but for me, all it took was practice. I don't think about the mortgage on my house. I've owned it for about five years. The money goes out every month. I work on renovating a room or building some furniture or going for a walk with my dogs. It need not be a terrifying specter; it'll either get paid in due course or I'll die and won't have to worry about it.

I think there are a lot of brains (and mine is definitely one) wired to make a bigger deal of things than necessary to provide a sense of direction and meaning, but this one is so abstract and so luck-based that, for me at least, it was deeply valuable to fight against it. I kicked it into the back of a closet, and for me it's a lot easier now to just live.

Again, YMMV.