Did something similar last year! Get yourself set up with the necessary health permits and find a good schedule. You might need to look into cottage food laws if you're in the US. Good luck!
One thing that can help with dry, crumbly bread is making sure your bananas are super ripe - like, nearly black. They'll be sweeter and will add moisture. For the burn, always check on your bake part-way through. Every oven is different and yours could run hot. For banana bread, …