Hey Niki,
With regard to the one man shop comment... if you have an Xbox 360, you should definitely check out
Braid, which was helmed by one man named Jonathan Blow (although he did hire an artist for the artwork).
Another tip I can give you is this: make a version of tic tac toe (or some other established and simple game) that runs on your mom's computer. Why? Because the hardest thing about making games is finishing them. It's good to learn what it takes to finish one with a very simple project... so you know what you're in for when you start frying bigger fish.
Good luck!
