Did you first SaaS project work out? Are doing your own thing now?
I think the most important thing was to learn that i can make money without a "regular job". I haven't turned rich since then, but i have all the time focusing on projects i actually care about which is the single best job i can imagine.
I find that engineers can enjoy more of such autonomy because their work can better stand on its own, and I'm a little envious of that.
I had to learn the basics of your job to succeed in mine, maybe it works the other way around too?