Starting a business is NOT just selling something: this is a big one! It’s kind of like that saying “anyone can have a baby but everyone can’t be a parent” - a lot of people can sell things, doesn’t mean they can run a business.
Starting a business is hard - don’t let anyone tell you otherwise. But it doesn’t have to take you many moons to finally get started. The saying “start the business now, make it perfect later” is 100% a thing!