Best format for a 4 team Fantasy Football league?

I'm running a leauge for my three idiot friends who wanted to play FF after they watched "The League". I'm in a regular league (currently first!) and take that one more seriously, so this is just for fun. To say its been chaotic is an understatement. We don't have any rules for trades, $$ for FA pickups or an entry fee. Looking for suggestions primarily on number of players per team but anything else will be appreciated. We want to keep it a 4 man league for now. Thanks.

( also none of the three has ever played before this)