CCG Basics?

[Azphreal]

I'm kinda new to seeing or trying these CCGs, but they look interesting.
I'm just not sure exactly WHAT they are or how to use them. As in, how to play them, what people want when they ask for people to give them sets, etc.
I need the basics.

[.Nu-13]

Each CCG has other rules, but all of them are basic:
When owner allows that, you can submit your own cards. If they're ok, they'll be accepted
Then, you just duel with other people

Seems basic, but the thing is, all cards are created by members, so it's quite interesting. And for all of them, you have to download YCD, a dueling program, but most CCGs supply them for new members.

Here, you have 2 CCGs to join:
Leo's CCG - the biggest one
TUCCG - don't know much about it, only except that it exists

There was a 3rd, NGD. It was mine, but it's dead

[Azphreal]

Thanks.