yesss, i'm ignorant:p

It's a league site: http://www.laene.nl/fb/

but how do i advice fb system that i won/lost a game? manually loggin in in the site? and then, do i need to be part of a clan?

To report a win, you need to login and follow the report a win link, you do not need to be part of a clan to play on the singles league.

Good look and watchout, the new person in charge seems to be easy on the ban button, or so I've heard.

If you behave yourself of course you won't need to worry about bannings.

you submit the replay for the game to them to verify that you indeed did win.