You don’t join a main bracket until you select a clearance level. The amount of people in your bracket should be in a red band above the black band that states how much time is left in the season. It is easiest to just check the last post in the thread, to see what the latest info someone has provided. If the time zone settings in your user profile are correct, you should be able view the time the person posted, to see how current their info is.
Useful info to provide
1)S.H.I.E.L.D. Clearance Level you chose
2)Current amount of people in bracket
3)Leader in bracket with amount of points
Your S.H.I.E.L.D. Clearance Level - _________
Current bracket - _______ people
Leader - _______ (name) / _______ points
Full bracket = PLAYERS: 5000