My go-to resources for vampyres demonic and otherwise:
These resources will be in 3 sections. Sanguinarian, Psychic/Psi and misc. I made sure these resources were for free and readily accessible for all that may be newly awakened, forced to be solitary with little to no information or just want to learn what's going on with your vampyre friend donor or not. There will be updates to these free resources and the links will be underlined and colored red.
The Red Cellar is a website in which you can find all the tips and tricks for your feeding needs. It has topics including but not limited to: Practical advice (safety when dealing with🩸and caring for cuts, precautions with donor-sang relationships, how to get 🩸and handle it safely from your local butcher), Recipes and Health and Wellness. This is also a great resource for "med sangs" or vampires that believe that they require blood for health reasons. (Thank you lexsang for tipping us off.)
The Misanthropic Vampire is for the more demonic vampires. It is a more spiritual approach than med sangs as its written by a Luciferian vampire like me but it still has a lot of great material. There's explanations and resources of/from the vampire community, vampyre book recs, the myths and legends commonly used, glossary of terms (incubi/succubi are classified as sanguinarian subsets here), and rituals to become one with your true self "the divine/beast/dragon/demon etc" and sit on the throne of your soul. Although the author has since abstained from being a practicing sanguinarian from personal reasons, they still mention the symbolism and sacredness of the intimacy between 🩸donors and the vampyre.
For Psychic/Psi vampires:
The Old Vampire Codex is free on sacred texts donated from the author themselves. From what I know, M Belanger founder of House Kheparu is actually publishing an updated edition of the newer "psychic vampire codex". But before that happens, I recommend this because it's pretty much still the basics. The foundations haven't changed. Everything from awakenings, dreamwalking, feedings, energy work and healing is here.
The Vampire Jack Townson has two different guided meditations. One is a basic one where you clear your mind, the other is putting your troubles to the side for a bit and going to your sanctuary to relax awhile. If you'd much rather relax in your soul's sanctuary then use this. Misanthropic vampire's throning ritual can be intense for newly awakened vampyres/demons etc so this is a nice alternative first step.
Orlee Stewart's Incubus/Succubus Playlist has a lot of things about incubus and succubus spirits. She talks about what they are, how to get them, the types of spirits she's encountered matching this description, how to encorporate their energy and become like them etc..