lets say I open this is co (AA-22,AKo-A9o,KQo-KTo,QJo-QTo,JTo,AKs-A2s,KQs-K9s,QJs-Q8s,JTs-J8s,T9s-T8s,98s,87s,76s,65s,54s,43s) and blinds 3b me.

How much in % do I have to defend ( mathematically) to not be exploited. I just think I just fold to much vs 10% 3b vs co/btn . Do someone recommend some videos to look at or can anyone help me :)