Hmm I see. I started as the petty king of Sweden, except I modified him into a woman aged 16 just for fun. It really is an easy location to start out. My stronger vassals conquered the Norway leftovers for me and one keeps expanding in Scotland and Ireland!
Try Rurik, you have 0 sea power to start to reduce your raiding power, you are norse culture and religion, your heir isn't though and no one around you shares culture or religion. Might be more of a challenge for you. I mean there are always easy groups and as a player you always have an edge I think over the computer. Playing as say East Francia is probably going to be pretty easy too.