Wanting to start your own business at the age of 26

I am 26 years old and I moved to America two years ago, I worked in many different jobs such as sales and service sector. I also buy and invest in some stocks regularly. But I don't know what to do, I think this kind of thing is a waste of time for the future. I think that I can be a truck driver for 1 year and save very good money and take all the risk with the money I save, but I don't have much idea about what to do and what to do. I think of an example like opening a cafe. I'm alone here and I work all the time I think I came here for a reason and I feel like I have to do something to make this happen. I'm open to ideas.