I'm having trouble figuring out the perk screen.Because this game can't decide if it wants to use keyboard or mouse I don't know what to push to pick a perk.I'm not even sure which ones I can pick or where to find a list of ones I already picked.

You can navigate the perq screen with WASD keys or you can point to stars with the mouse. Blue stars are perqs you can pick, purple stars are too high for your skill, and orange/yellow stars are perqs you've already picked (although there are some of these you can pick multiple times, each level of the perq has its own skill level requirement). Click the star when it is the highlighted star in the center and that will register your choice.

Is there a list somewhere of all the perks you have?