I've set up a CL mini league and anyone can join.
League name is charlton life (all lower case
) and the league pin is 6452
Once you've picked your team it'll take you to a sort of main page where it displays your team and just below the it'll say 'your private leagues'. Click on this and enter the information above.
I'm also aware that there was another CL league set up for this but it broke so this is the new one so enter this one and not the other one.