"Teams"

[Riku]

I'm a bit confused about teams.

I was told by some that I could form a team with whoever I wanted and it'd be okay.

Then I was told that a team of two genin didn't get any benefits.

And now I'm being told that if I want to be in a team in my village I have to do it with particular individuals.

Can someone please clarify this for me?
1)What do I need to do to form a "team"
2) can you only be in one team at a time?

[Windfall]

A team or cell is comprised of one or more genin, however for it to be completely official to where the benefits become active, said team must be led by an active Chuunin or Jounin from that village.

[Riku]

thanks for clearing it up for me