Stock Market Game-1-Initial Investment Strategy

The stocks that I am considering is the really big companies like apple or mcdonald's or nike. I guess I will by a lot like 15 or something. I don't really know because I haven't ever bought a stock or had anything to do with stocks so it's just all new to me and I don't even know really where to start. I think I'm going to be risky and conservative because like I said I'm new to this . But other than that, I'm just going to try to get as much money as possible so I could beat Mr.Moloney and get a 100 for my grade!.