Set everything to its middle position, then you need to set the sag which is how much the fork compresses under load. Get all your riding kit on then resting the bike against something gently get on and put all your weight on it in a normal riding position. Fork and shock should be marked with percentages on the side, get off and you should see what percent sag you are currently at as the ring on them will stop at the sag marker. Add or remove air to get to around 25-30 percent sag as a starting point. Then ride and play with everything to see how it changes. Forks should have an air guideline on the side to give you an idea of psi for your weight but frames all behave to differently to put any advice on the shock. Get on and off gently when setting sag as if you jolt too much you’ll push the sag marker ring further into the travel and give a bad reading. Do the fork and shock separately.
There’s virtually nothing from sram on setup, the manuals are only tech ones as everyone’s bike and style are too different. Once you’ve got everything in a basic set up and you start riding it you’ll feel what you want to change and by making little adjustments you’ll get there and learn how it all works.