If I get G3 I plan to get a 256mb video card and 1gb of ram to go with my 2.53ghz processor. This will run it just fine, much less will not run G3 very good.

Yes it will help you to learn to fly helicopters. I used G2 to learn which requires much less computer power to run and can say without a doubt I saved a lot of time and money by learning on the sim rather than the heli. I know have 22 flights on my Raptor 50 without a crash and have been doing all sorts of aerobatics. Do yourself a favor and get a sim if you want to fly helis.