Perhaps only if rich people start a small business, it will generate profit from the very beginning. All other form of business start operating with losses and no profit. Or a business that is hobby or someone doing something rarely and for fun will operate with profit. Working as an individual entrepreneur, selling your own service - that allows to work with profit from the start. All other businesses start with loans, credits and start giving profit after several years.
I think resellers business operate successfully with losses for years. All you need is a money in turnover to make purchases. "Take money/pay money minus own salary" is basics of such business and endless being in a loss stage.
Starting a business is always stressful because it comes with fear of the unknown and stepping into something new. But it is important to remember that it is through these challenges that we grow, build resilience, and develop our inner strength. Skills do not appear overnight; they are built through repetition, experience, and a willingness to learn from each attempt. Personally, I would not start any business with large investments — if only because I do not have that kind of money. But beyond that, I genuinely believe that everything should be tested with minimal investment. That is the only way to realistically assess an idea, see if it works, and understand its true potential. If the business starts generating profit and there is visible room for growth, it is definitely worth developing further and eventually seeking investment for scaling. But if there is no profit and no signs of future potential, I do not think it makes sense to wait for years hoping something will change.
But you only get feared of certain things unknown if you didn't study well on what you are trying to enter. Since if you done good feasible study and you are good at the business you are going to establish then I think starting up won't give you a problem.
If you are still doubting worried or get stressed about what will be the possible outcome in future then I think your not ready for doing such thing. Much better if you go to business seminars and get an idea with experts since there's provably lots of learnings to get from the word you get from them.