I really like the setting and am interested just a few questions first in terms of characters.

Is there a magic system you have in mind or is it generally broad?

Is there restrictions on gender, or if not is there some societal difference between male and female witches?

You also mentioned vampires and werewolves having their own sources of magic. Can witches be those monsters as well/ can we play a supernatural monster?

Sorry just like to have all the details before thinking up a character haha.