Go to the computer on your left, press the button that says "COLORS" on the right side of the keyboard and then choose your colors.

Go to the computer on your left, and start typing your name on the keyboard and press "ENTER" when you are done!

Go out of stump (the area you spawn in), walk forwards until you see the sign saying "Shop", enter the tunnel, and equip your cosmetics! Don't forget to press "Claim" on the limited cosmetics!

You cannot simply ask to become a Moderator and expect to get it. Instead, the process of becoming a Moderator involves earning the trust and respect of the creator/owner and existing Moderators, and submitting an application when they are out. There is no guarantee that you will become a staff member after you apply.