how to get started, low risk 10% return?

[tommo]

hey, I've built up a significant income from poker and have about 50k to spend on investments. I'm worried that the poker market might eventually dry up and I'd like to invest this money.

I want to start a business after college (so three years).
Basically, I'm looking for a good way to invest my money that will give me a decent return 7%-10% with little risk and still allow me to withdraw money in 3-5 years.

I have no idea whatsoever how to get started as well. I'm not even sure how people go about buying stocks or bonds or whatever it is I should be buying/looking at. please help me out.