I'm in a similar situation. I've read a few basic introductory books and started doing problems (I would recommend 321go.org for an easily accessible start), but I'm obviously still very much a beginner.
So I worry about wasting stronger players' time on KGS; I also worry about misrepresenting myself to absolute beginners, I feel like I'm sandbagging when I beat them. Net result: I end up playing the weaker bots only, and I'm actually unlearning what little I knew already. My advice is: don't go down that path (as many others here keep repeating to beginners, many of whom apparently have the same impulses

).
I'm sibbedeus on KGS, hope I see you around!