To assist yourself with finding a team:
Why do you want to be in a team?
What do you expect?
What type of driving do you prefer? (Drifting, day-to-day pickup-races, leagues, endurance, etc.)
Do you have specific favorite types of cars?
How experienced are you?
What kind of team are you looking for? (Just-for-fun-maniacs, not-looney-but-not-too-serious-either, dead-serious-with-drivers-contract)
And another hint: Try visiting the servers of teams and their websites. Look for teams that engage in the type of racing you prefer (f.e. look in leagues for members of teams) and then check out the drivers on the team's server to see if they are nice folks. Then you can ask them for a membership.
Vain