O, Level 11 is low!!!
The best thing to do is to reach a "waypoint shrine", there is one just past the library
inside that Maxos Temple! Run through the library, maybe use a skill so the Black Rings can't see you, use shrine and go first to explore Brocken Valley or go visit the Orobas Fjords (youmeet there Level 18 enemies, but when I was level 13, I kill a few of them ... grin!

I'm sure you didn't all area and/or quest, because Level 11 is low! Good luck!

I go in the Maxos Temple when I was at least level 15 or 16.

On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin,
it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !