I hear that getting a decent notebook and a few pencils is a good way to start any project.

Make sure to flesh out the design, and if you ever think you can "wing" something while you're doing it, don't. Give up on that notion right away, because it is, as it turns out, the project annihilator.

You don't "design" a game with OpenGL, you use it to make one

well first of all you'd need to actually write up what you wanted to make. After that, you'd have to start to learn a programming language and then you'd need to use how to manipulate the graphics hardware - probably through ogl/d3d when talking about the PC. Then you program the thing with you beautiful art.

you can check the "start here" section at gamedev:

http://www.gamedev.net/reference/start_here/

and you can read up a small arrticle I wrote up which explains things much better over here:

http://triplebuffer.devmaster.net/articles/

(it's the first one)

good luck to you anyway.