Groundwar is good, airwar leaves a lot to be desired.
The are lots of bugs, a lot to learn now, if you get in a Squad they'll help you learn faster, get you on Teamspeak (theres no ingame Voice comms), get your around the oddities, and you'll be in on the main action having a load of fun.
Be warned, make sure your PC is up to it, I have an XP2800, GF5700FX, 1Gb of RAM, anything less would be painful. The RAM is the important part.