The best business startup is the one that suits your skills, experience, temperament and financial wherewithal. Only you can determine that.
There are so many different opportunities, the problem is narrowing the choices to ones which have a definite market demand. What is it people need, and are willing to pay for?
Generally a successful business concept addresses one of three mandates: the business performs tasks that nobody wants to do (trash, cleanup, bookkeeping, plumbing) , functions which are difficult, or require specialized knowledge (computer programming, construction, dental work), or it provides recreation or lifestyle enhancement ( restaurants, entertainment, gyms, personal trainers).
In order to be successful, a business must have a USP ( unique selling proposition), a well defined, identifiable and reachable prospect base, and a business model that provides for adequate profit and cash flow.
“Occam’s razor” is the principal that the best solution is usually the simplest. Many entrepreneurs try to make things too complex. Pick a business that is simple, straight-forward and not too expensive to start. Do a test marketing to see if it will fly. Then roll it out.
We have some excellent videos and other material at https://CEAnow.org (https://CEAnow.org) to allow you to explore what you’re best at, and which business ideas might be the best to pursue.