okay...since not many people know how to play on a server, I'll try to make a simple guide about it XD
first of all, you need KRO/sakray. Because almost all server need it (item sprites, etc)
you can get it here:
http://ratemyserver.net/index.php?page=download_kROLinkssecond, open the website (the one you will play)
third, follow the tutorial, download everything you need
fourth, make your ID, you can either use _M or _F for the first time, or you'll need to use control panel (CP), depends on your server
fifth, read the rules! there's no reason "I didn't read the rules please forgive me".
sixth, start the game, make your character, and , done! you're ready to play!!
additional:
don't forget to check server's status
don't forget to check if the GMs are corrupt or not (for this, you can try to ask your friend, or maybe you can try to see review on here, thought it won't help too much since there's too many unfair review)
don't be a jerk
don't act like you're smartest people
if you're having problem, you can try to ask GM, or other players, but be sure not to SPAM question, most GM will ban you if you SPAM your question, because they need time to answer your (and the other)'s questions
if anyone want to add, then please :3