For the nomadic lifestyle, find a grassland that's in-land, ideally one that has a nearby a broadleaf forest though a conifer forest works too. Grassland has plentiful food, no wild boars or bears to kill you, and can be run on with less stamina drain. In addition, tamable animals such as Mouflon and Auroch spawn on grassland, so when you want to start a ranch, that makes it so much easier. Grassland, Heath, Moor, and Broadleaf forests have apple trees and nuts, so you're never in danger of starving. Rabbits and chickens are also a good source of meat that will be available.
http://ringofbrodgar.com/wiki/Grassland
If you can't find a nearby grassland, do your best to find Heath or Moor. Failing that, Broadleaf forest. No matter where you settle down, get Yeomanry as soon as possible and build a roundpole fence around your land. This will prevent wild animals and lesser bandits from harming you -- as without Trespassing, Theft, and Vandalism, a thief cannot get through your roundpole fence as long as it's within your personal claim. Animals also can't spawn on personal claims or see you over your fence, so it's somewhere safe to work and hide. When you can, build a palisade and eventually even a brickwall.