At level 10/11 you could start killing in Kerra Island. The tiny rats that run around the zone and possibly the cats at the entrance. It's really good xp and will take you into your twenties. It's negative to Kerra faction but not really something that is needed unless you'd like to keep in their good graces. (The rats I don't think give faction)
http://wiki.project1999.com/Kerra_Island