I'm interested in some of the things that y'all have done(I've been peeking around the threads) and I'd like to dip my toes in the water a bit.

I'm thinking that I'll create a reaction time counter. My idea is that there will be a red light and that light will turn green. Whenever the light turns green you hit a button. It will then display the time measured in milliseconds how quickly you reacted to the light turning green.

My questions are... how do I get started, how much money do I have to spend to get started, what language do I need to learn, etc.?