Dark Sun - Ruined World
Please read this stuff before playing!
- pg 25 of Players Handbook 1 – Making Checks
The basic fundamentals of d20 roleplaying- how to make your character do shit
- pg 264 of Players Handbook 1 – COMBAT!
Goes over movement, initiative, what you do on your turn etc
- Your class description + details
Find whatever book it is in (PHB 1, 2 or 3) and read all about what you do
- Your race information
Same as above, read all about your race in whatever book it is in
- The Dark Sun campaign setting guide (4th edition)
Read as much as you can of this, to learn more about the world.