I understand the lighting issue, but having said that I would recommend not standing behind the main light source for your pics. I think you may want to either tuck the shirt in or try a shorter top. I think your legs look short here and tucking may solve the issue. Also, I think you'd look a lot better if you trimmed your hair on the sides.
You're also pretty ripped. You need to roll those sleeves up further so passersby can admire the guns. You worked hard for them, show 'em off.