well...first things first...
speaking from my application experience, the leaders of {TBR} (Iguanamoo and Bloodsport) look for specific map/mode and weapon preferences.
Point 1) If you want to be admitted to this clan, you MUST play official maps. Official maps are the ones that come with the game when you first download it. For your favorite map, please select something official.
Point 2) When picking your favorite official map, I highly recommend that you do not pick ac_douze. It is looked down upon in this clan and much of the AC community. Picking something else will help your app.
Point 3) Although TOSOK is not against the rules, this clan requires you to have good skill in CTF and flag modes (again. speaking from experience). If you are new the idea of "clan matches", you will find that TOSOK is probably only played 1% of the time.
Point 4) Practice a shit ton. Whenever you get a chance, join a CTF game and start playing. Ask players for 1v1s or set up inters. This increases your skill.
Point 5) Try to use skype. I know it may seem a bit awkward at first but you don't actually have phone conversations with us. We only use instant messaging. Skype is our main way of setting up matches and practices.
If you want a chance here, I suggest following all five of these points. Otherwise, good luck!
and btw, what part of the east coast are you from?