u/Littlelacho

New GM here, planning to start running a campaign from the GM Handbook start scenario onwards. Since the relationship between the Cymric People, the Saxons and the Picts are all important to the first few released adventures for 6e, I find myself unable to actually grasp these cultures and the core of what they represent. Can anyone provide a breakdown of all the British cultures, how they interact with each other and what that there sort of stereotype is?