Time Travel

If I could travel back into time, I would travel back when when Bill Gates was just starting on his computer/technology idea, so I could tell him what to do. After I gave him the guidelines of the modern day computer, he would pay me 1 billion dollars for helping him make his however much he makes. I think it would also be cool to go back when I was little so I could tell myslef different stuff that would change bad things that had happen to me.