Which path should I take at 18-years-old?

I'm an 18-year-old freshmen in college. So far I have programmed 2 iPhone apps on the App Store but made no money because I did not monetize them. I have had several salesperson jobs and have taken leadership rules in the past. (sat on a board and founded a club) I just can't decide what to do with my life right now. College does not take up all my time and neither do my jobs, I still have 2 days a week for leisure time (weekends). I can't decide if I should start a retail food company, code more apps, or come up with some innovative tech idea. I'm very bad at coming up with ideas. I do want to be an entrepreneur it is just I have no ideas that are not already taken or my idea will be something super hard and not invented. I just do not know what to anymore.

Added (1). I also have $5k to invest but do not know where to start

Path