[Investing] Advice needed (medstudent)

Hey fellow Redditors, I'm currently a med student(toronto) in hopes of one day attaining a M.D and work my way towards being a surgeon. I am fortunate enough to have a father who is willing to pay off my tuition. I have a lot of free time on my hand and would love some advice and ideas as to: what would be a good investment in time. I aspire to accumulate the maximum wealth that I have the potential to make. I've come across ideas such as stocks, starting a business, learn about entrepreneurship etc What are your thoughts? Thanks for your time!