Welcome mate,
Initially the lack of "oomph" is a bit strange when playing through headhones/monitors/pa etc.. A very different playing experience than most of us were raised on for sure.
However, to put any of your doubts to rest, simply go to you tube, search for a guitar backing track in whatever style floats your boat, and noodle out a simple lead line... it all becomes clear.. it actually fits in the recording and sounds great while doing so..
and yeah, as others have said.. with a poweramp and guitar cab (how I play most of the time).. the pants flapping, grin inducing, "proper" R&R experience is there with all the tones you could ever want.
Make noise.. have fun.. and again..
Welcome!