I'm not saying you look bad at all. Like your said, you have only been training for 3.5 months. That is nothing, you are just beginning. Keep at it! You will see the results you want, it just takes time. And YES, I deff. think by not working legs you are screwing yourself. Now is the time you need to get yourself into the routine of working legs. Squats, Deadlifts, lunges, etc.... do it.