Don't go to the temple right now. Switch to creative mode (/gamemode 1) And take the stuff in the bonus chest. And now you can teleport to the temple. (Example Command:/tp benjaminpants 7654 ~ 2345) If there is a village next to the temple ignore this next step. Give yourself 2 potato seeds and 2 wheat seeds and give yourself 3 apples. Give yourself 2 saplings. Even if there is a village nearby.
You still have things to do! Now find the basement of the temple and break the chests and then do the command "/kill @e[type=Item]" And then replace the chests with empty ones. Build a ladder up back too the main room. Now you can go into survival mode (/gamemode 0)
Too hard? Video version of this tutorial here:
You can raid nearby villages.
You are not allowed to leave the desert. (Unless raiding a village of course.)
You can leave the desert if you are underground. But once you are up at the surface and you are not in a desert you have to turn back.
Stay away ghouls!
You have to craft torches and surround your temple with torches. To keep the hostile mobs away.
Craft stone tools. As simple as that.
Raid a village
You can only do this if their is a village nearby. If there is you can go and raid it. Take as much as you need.