Hey man
First off, no you cannot add friends on YGOPro, you can however host private games, and that is what we use Academies for, to arrange with people you meet here to duel, be it for fun, for testing, or you can do Battle Arena duels to play competitively. For most duels you can just speak to people on the chatbox, otherwise we use Skype for the most part for staff chats, team chats, any other group chat, as well as adding people you meet to duel whenever.
For Battle Arena Duels, just visit this link to familiarize yourself with the rules and procedure:
http://www.chaosera.org/t42-battle-arena-rulesYou can also do Shadow Arena duels (only once you're in a dorm), these are the same as Battle Arena duels (BA's) but you bet DP for added risk. DP is the forum currency we use. Here's the link:
http://www.chaosera.org/t43-shadow-arena-rulesThen for tournaments, these are all hosted on the academy, we have several types...
Weekly BashEvery Monday night (8:00pm), this is a 16 person tournament, match format, you can use anything you like.
http://www.chaosera.org/t3495-weekly-bash-rules-and-informationDeck RouletteHeld every 2nd thursday. This is a themed event, different theme every time, 16 people, match format. You basically have 1 week to register and build a deck based on the current theme, then 1 week to duel through the bracket.
http://www.chaosera.org/t4687-deck-roulette-rules-and-informationYu-Gi-Oh! CEA Championship (Y.C.C.)This is our major event, similar to YCS. It's usually a 64 person tournament held twice a year. This is the most competitive event on the academy.
http://www.chaosera.org/t3689-ycc-rules-and-information#27841User EventsUsers also buy and host their own events. There is 1 or 2 coming very shortly.
On YGOPro you'll also find a Linux Server, this is a type of ranking system where you can duel and climb up a ladder. Just register a username and password on YGOPro, and you're good to go. It can take some getting used to.
For all events you need to be in a dorm. To do this you get tested by one of the light blue names you'll see around the Academy. A test consists of 2 matches, and will evaluate your dueling and deck building skills, and place you in a dorm of either Slifer, Ra, or Obelisk. To find out how you will be scored, visit this link:
http://www.chaosera.org/t55-dorm-test-rulesIf you have any questions you can PM an
Admin,
Moderator, or
Tester, and they'll be able to help you out.