> So you need to work consistently 1-2 hours a day on your side project.
I would underline this consistency. I found that as long as I'm regularly doing even the tiniest of improvements to my side-project, I am very efficient over the span of a few months. When due to other obligations I drop the habit, I start forgetting how parts of the codebase work. It becomes harder to restart the project and the whole thing just seems depressing. Consistency is key!
Also, I would recommend checking out Indie Hackers if you need inspiration :)