I agree what everyone else has said, in my experience no one really gives two hoots what anyone else is doing in the gym, the only time I look at someone else is if I notice a top of shorts or something I like (shopaholic lol). I respect everyone for just being there and I couldnt care less what they look like when they are working hard- I know i look a sight once i get started lol.
I only just joined, i think its been about nearly 2months now, and Im loving it Im a complete junkie. In the first few weeks I gained about 3kg, so i understand what you mean there, but dont worry it does start coming off again I promise. You will most definatly be losing fat and gaining muscle, also when you start lifting weights water holds in the muscle a bit more so you can sort of a false positive if you get what I mean?
Best of luck- next stop gym junkie town.