I'll agree w/ Rob... there are WAY, WAY, WAY to many W-SS units!! As fo rother stuff, there are tons of impressions, but if you've never done reenacting, perhaps you should find a unit that does some of what you're interested in.
Like Rob, I am starting an off-the-wall unit, well a Luftwaffe Field Division unit -- a total anti-elite impression. It's hard and WE ALREADY KNOW ABOUT THE HOBBY. :-0 It's different and not at all like you'd think it would be. I will tell you to tak eyour time, don't just buy shite 'cause it's cheap -- by good stuff and you can go anywhere. Look around, ask around, visit unit websites. DO your research.
Best, Marsh