So did one of my friends, but hey, he's the one with the better computer than me ;-;
ARMA is the kind of game you need to have an interest in, watch someone play, learn most of the gameplay before you get it, buy it, learn all the controls and how to use the level creator without a tutorial, and then learn how to play the game properly before you can actually, you know, have fun :P Thankfully, I did that, and it's currently my most played game at 57 hours or so.