Cindsman - a user here - has set up a fantasy football league. Basically, you take charge of a football team and "manage" it in a league. Games are twice per week and it's not very time consuming, but seems like a good site if you are interested in Football Management and want a bit of fun.
Basically, all you need to do is sign up to the site. When you eventually get logged in, chose "Find League" on the options on your left. Enter the League ID, which is "34970". Complete your team name, Home Ground name and kit colours etc. Put a quick note on saying you are from Brainking (so Cindsman knows where the team has come from) and click submit.
The league will start when there are enough teams, but in the meantime you can play with your tactics etc and do some messages etc.
It seems quite an easy, non time consuming bit of fun - so feel free to sign up and join the league.