Arith's YouTube channel is full of well-considered information on Nordic mythology and culture. He's a trained archeologist and has a strong personal interest in this field. I highly recommend you subscribe to his channel if you are also interested in elements of this topic.
I know many of you are especially interested in Wolf Essence, in the Karistus context, but very little is available from that source, so here's another way you can spiral into, and awaken your kenning ... Arith speaks quite a lot about Beserkers and Werewolves in the Viking context, and the Norse Vikings were known to be mainly Karistus hybrids ... the Dane and Swedes not so much.
So here are some links to some of Arith's videos on wolvery:
Werewolves in Norse Mythology
The Werewolf Cult
Indo-European Wolf Rites
Berserkir & Ulfhednar
Totemism in Norse Culture
Wendish Religion: Ancestor Cult, Werewolves & Vampiric Dead
Book Review: Werewolf Magick
Not on the wolf theme particularly, some of my personal favourites are linked below: