You seem to know what you want to do and have the right attitude.
Opening a food facility is a valuable learning experience. It requires patience, understanding human nature, labor management and control, purchasing, food prep, engineering, sanitation. You have to be a little bit of everything. Oh Yes if the toilet breaks you should know how to fix that too. Keep your menu simple,
Things that you can't hold or serve correctly don't make.
Do what you are best...