I don't know that I really could have done anything differently, considering my circumstances. I was out of work, broke and really struggling just to keep a roof over our heads and food on the table. I couldn't change that, or the fact that my parents got sick one after the other with serious health problems, or that my youngest son hit some rough years, or that my own health failed (stress and extremely poor diet, most likely the cause).
If I'd had even a little money, I'd wish I could have believed in Select, in mailing lists, in Bookbub. I'd wish I could have focused on writing novels, instead of barely writing at all. I'd wish I didn't try writing erotica right before KUv1 ended. Though even my crappy stories were selling pretty good for a couple of months then.
I try not to look back with regrets, because whatever I was doing, it wasn't wrong for the times, and self-publishing was so new there wasn't really a "wrong" thing to do, just things that as the industry developed turned out to not be how it ended up. Things changed, stuff some writers were doing pushed us in certain directions, Amazon changed how they wanted books to go, and we got what we have today.
Doing what "works" today likely won't be "right" in ten years. It's always changing, self publishing is maturing as a thing, and we have no idea what it's going to be, just like in 2009. My belief is we do what we can today, and be ready to adapt. That's how you stay viable for whatever changes are coming.