To answer your Dvorak question about the keys you mentioned:
p, o, i, u, y, j, k, e, $, x are typed with the left hand. h, l, (, ), w, b, t, f, d, v, w, g are typed with the right hand.
So looking at what moves where:
Stay on Left | Move to Left | Move to Right | Stay on Right
----------------------------------------------------------------------
e $ x | p o i u y j k | w b t f d v w g | h l ( )
They keys you use are still mostly evenly distributed between left and right hands, but most of the solo-keys are now left-hand, and most of the chorded sequences are right-hand.
Also, the process of learning Dvorak will slow you down significantly, which can help to reduce the strain on your wrists while you make the transition.
You can enter a sample of what you regularly type into websites like http://patorjk.com/keyboard-layout-analyzer/ , and see how much more or less distance your fingers have to travel under different keyboard layouts. (There are other neat metrics to look at, too. Click the tabs on the left and explore!)