It's not hard - just ask someone. Seriously. The mechanics aren't particularly hard, and if you act in good faith, the vast majority of mistakes are fixable.

It's not hard - just ask someone. Seriously. The mechanics aren't particularly hard, and if you act in good faith, the vast majority of mistakes are fixable. Step one is by far the hardest (assuming you're including "selling it to customers" in the "make something people want").