I have an idea for a Gun Shooting game, but have no idea where to start.

XNA is your friend.

make a programmer your friend too, an artist as well if your hands are broken.

Always keep in mind, work with what you have, not what you wish you had - the results will speak for themselves.

 

Don't forget a decent musician and/or sound effect person.

True. Remember, you can always replace artwork etc with better stuff later - concentrate on just getting something done first. Also, be prepared to redo huge parts of the project from scratch if necessary.

 

Exactly why my brother gave up on it. Got the experience was shitty and dropped out a few months from grad. Its okay going into a job to do with one of your hobbies but it leaves you burnt out and bored of it

 

Everyone I know who's got into game dev (or worse, QA) has kind of lost interest in videogames as a hobby as well. I doubt I'd be here posting if I'd ever made the jump.