@KristinaD.93
Norse Deities Master Post
Above is a good post if you want to learn about Norse Paganism.
Suggested books or authors?
I follow Loki Norse Chaos God (and everything else he covers 
), but I don’t strictly follow Norse traditions. I’m a Mish mash of all sorts really. I chat to demons, do the Wiccan prayers on the app, and have been helped by The Morrigan (Celtic) to do shadow work, but Loki’s my main man 
As far as closed practice goes, I don’t know really. An old witch who runs a crystal shop near me, said these sort of ideas weren’t around in the olden days, but then there was less travel too, so those witches of old may not have been exposed to as much as we are now, so would’ve done what was local. 
. My fathers heritage is old German, my mothers Irish, so I lean more towards my father’s side, but I do practice baneful Magick, and hoodoo, and I have voodoo dolls (I have one on my altar to Loki for my own healing, and carry a mini one with me too, I don’t know why, just do.), I also use worry dolls.
I personally feel that as long as your respectfully practicing, and not causing any harm to the culture or materials of their culture, its ok. May just be me.
We have some Brujera witches here, @crystal59
This link shows all the wonderful and varied traditions in this coven
Weekly Witchy CHALLENGE - Magickal Traditions & Pagan Paths
And another path I follow, as do many witches is the beauties (demons), and you can explore that here:
The Demonolatry Club
For baneful practices, I use Thalia Thorne’s book, The Wicked Grimoire
And my favourite Bruja witch is Juliet Diaz, and her book Witchery.
This is such an international and varied coven, I think every path is covered here by someone. 
Hope this helps. Have fun. Blessed be 