hey, if you could tell us your price range, and the style(s) of music you'd like to learn, we could point you out better.

but personally, I think that the vox ad15vt is probably a good amp (never tried one, but from what I've read on the net, it sounds like it would be great.) for $180. and that will give you a 15 watt amp, which won't be too loud, and will be good for practicing in your room by yourself.

but if that's out of your price range, I'd stick with something like this: http://www.musiciansfriend.com/srs7/g=guitar/s=amps/search/detail/base_pid/480667/ because it is 15 watts, so it's not too loud, it has a drive channel which is good if you want to play rock or blues or alot of other genres of music, it has a 3 band EQ which is good for customizing the sound, it has a headphone jack if you need to play extremely quietly, it is affordable at $80, and I have the same brand of amp and I like mine, so, this would probably be a good one though I have never used this one in particular.

of course, if you find another amp that fits all the above descriptions, then you could go for that one too