Personally, I would stay away from the curb area at lights, especially if you are riding in the lane. This opens up all kinds of space for cars to crowd you and make things stressful. Try working on your stops and figuring out for you what is comfortable to do. For me, I always end up like this at a light.
I keep my right foot (stronger leg) clipped in the pedal and support myself with my left leg. When the light goes green, you have your power leg starting you off and you just sort of hop up on the saddle and go.