The SKS is a great first rifle (it's my first and only, currently!). I really like the fact that you can easily strip almost the entire thing with no tools. Not only that, but they can't be beat for the price (price of the gun OR the ammo).
Just make sure the firing pin rattles when you shake the bolt; the firing pin is supposed to free float. Otherwise, it's a pretty straight-forward rifle, very good for beginners (not quite as good as a .22, but oh well)