It’s still got a raspberry (zero) in it and I’m selling it as a prototype still. Next version going for a smaller and cheaper MCU.

I’m just trying to move as fast as I can without chewing too large pieces. When I started I had no damn clue how to go forward but as I started chugging along stuff started resolving itself. Never thought I would be designing custom PCBs for example. Or sending physical products by mail to people on the other side of the world.

I guess my advice would be to try to get to a stage where you can deliver a product to someone as soon as possible.