You're not retarded. Anyways, head over to
http://redcountyrp.com and navigate yourself to the
registration form. Make your account, verify it via your
email, and then
submit a character creation/application. An admin will review this to see if you're able enough to roleplay on the server.
Once your character application has been accepted, you'll be able to
create your first character via the
user control panel. Once done, head over to samp.exe and enter your
MASTER ACCOUNT name into the username portion
before entering the server. Enter the server,
login using your master account password, and select your character. Your master account is the account name in which you used to login to the user control panel on the main website. Hope that clears everything up for you as I've explained it as best as possible. Lots of people get confused about the difference between their master account and their character.
Do NOT login with your character name.