I try to make sure my wrists don't bend back towards me when I'm riding - so I move the shifters kinda so that they are pointing down towards the front bike wheel... it keeps my wrists in sort of a neutral straight position... If you're bending your wrists you can aggravate things and make things go numb. Move your hands around, and keep the weight off your wrists as much as possible.

You already look pretty upright.