Hope you give it a go as its a great father/son hobby. My suggestion is to visit a few local hobby shops and just look around. Often they will have flyers directing you to local fields and clubs. See if they have a simulator or two available for you to test in the store. I happen to like RealFlight. It is the best +/- $200 I spent when first getting started as it will save you a plane or two. With both of you it would be really half the cost and should either of you bail out it can be used as a neat video game. Main issue is to be certain your pc & video are strong enough to support the software. You will have to try to really "fly" and land the planes until you master it on the simulator. If you do you will be amazed at how much the real plane is represented once you do take to the air.

Best of luck to you and your son,

Clay