Great series — documenting the whole setup process is really useful for other devs going through the same thing.
One thing worth thinking about early: once you're live on both itch.io and Google Play, you'll end up checking two separate dashboards every day to get a picture of how things are going. I ran into the same problem and built AppWatch (appwatch.dev) to solve it — pulls your itch.io and Google Play stats into one place. Free for up to 3 apps if you want to set it up from day one.