Here’s my advice for people who don’t know what business to start but want to start their own business. Just start. It doesn’t matter what it is. It will probably fail. And once it fails, start something else. Once that fails, start again. You’ll eventually find what works.
Your first business should be low cost and ideally something you can fail at quickly. You’ll gain valuable skills that you’ll carry with you for life. Eventually the businesses you start and grow will survive longer and grow bigger using info gained from past failures.
The faster you can go through cycles of learning, action, analyzing, elimination, scaling and growth, the quicker you can get to what works. You can’t skip a step and none of the steps alone will help you find success. There is no replacement or shortcut where you can avoid action.