One of the fun aspects of a new bike is "tinkering", (a lost art, I feel)! Set your tires at about 45 p.s.i., then go for a ride. While out there, drop the pressure a bit (small blast) and see how it changes your bikes handling and speed. Keep doing that until you're happy with it, or back to the trailhead. Adjust up and down till you find what you like.

Same thing for the rear shock. I believe Fox states to start at rider weight and adjust up/down for preference!

L8R