I was a confused university student and once I found out about the investment world, I did not go to a law, business or medical school. I went to Wall Street as soon as I could.
It didn't take me too long to figure out that many people didn't have a clue what they were doing in the investment world. I saw other people making mistakes, and I saw that following other people usually wound up being a mistake. It was hit and miss, so I stopped listening to other people and started doing my own research and investments.
So I tried to find things that I knew or thought I knew would be successful - usually something that was cheap or had a low valuation, based on however you want to value a stock. I realized if you find something that's cheap, even if you make a mistake, you're probably not going to lose a lot of money. If you're right, it could go up a lot.