Oh, that's alright; it takes me a while too. The only reason why I know my way around is because I've been here a while.
Anyway, welcome to the forum! (I love your avvy!)
The Skandarnite thread is sometimes easy to miss. If you enter the forum "Cast and Crew Discussions" and right above where the normal thread are, you will see a section that says "Fan Club Section" or something like that name. You click it, and since there are only like 5 threads in there, you should see the Skandarnite thread.
To become a Skandarnite:
you go to User CP>Group Memberships>Join Skandarnites
you fill in the reason why you want to be one, and because it has to go through ~Rogue~ you will have to wait a while (Or at least I did) before you are accepted. (She has to process them, I think.)
(If you ever need help on anything, feel free to PM me!)
Yeah, and just so I'm not spamming, I think Skandar will do a lovely job in Prince Caspian!