From what Ive come to understand Astral projection is a form of advanced consciousness. Or a state of advanced being, simply put all aspect of your being have aligned with the wavelength of the world around you in a spiritual factor. There is no magic involved in the process, you simply are.
The concept is still hazy and often leads to more questions than answers, meditation and clarity about oneself seem to be the most likely methods to achieve a projection.
Magic and Astral Projection have never really crossed paths in my opinion, but I suppose you could use herbal remedies to increase awareness and promote clarity and relaxation to raise your chances of achieving AP, but I dont know if any spells or such that could assist in this case.
Theres no method that will work 100% of the time and teaching it would probably be just as hard as doing it yourself, the furthest youd probably get with a teacher is Lucid dreaming- in my opinion at least.
Tea, Incense, and Oils would probably be a nice place to start looking, maybe even guided meditation (?)
As I stated Im no expert on the subject, but I hope this helped somewhat, and I wish you luck in your endeavors. Blessed be, 3clipse.
AP from my understanding is a deep meditation where your spirit goes into the Astral Realm, which from what I know is a realm built on dreams and imagination (I could be wrong,but this is how I see it)
Now, as a heads up, this is my personal experience so this doesn't go for everyone.
Imagine a big space filled with a bunch of bubbles. Each bubble represents a different realm. We all have realms inside the AR (astral realm) that we can go to to contact spirits, gods, ancestors, guides, etc. You can control what happens in this world.
Those other realms are other people's realms. You can visit them, but you won't be able to control the world, since it's not yours. What you do is up to you, but trying to suddenly make it rain if the realm is a desert, not happening. There are also realms based on the combined imaginations of others, so if you want to go to Kingdom Hearts world, you can, but be careful.
I usually give a big old warning label but I've already told it once and I think it's losing its effect, so I'm going to do this: The AR is a wonderful place to exercise yourself spiritually, but that should be all it's used for. It is seductive in that anything is basically possible. It's caused a friend of mine to become suicidal because of this feature.
It's also not 100% safe. You can get hurt, you can go so deep into the AR you forget you're in a vision/dream. When I say you can get hurt, I mean your physical body can sustain damage. Why, no clue. Just be cautious of that fact.
So, a basic list I've compiled for AP safety!
1. Anchor. This is extremely important. This keeps your spiritual body linked to your physical body. This anchor can be some lucky socks, an amulet, a teddy bear, a pet, just something special to link you to this plane.
2. Remember you can wake up. This also very important, and why you need an anchor. If for any reason you feel unsafe or threatened (because trust me, it can definitely happen) WAKE UP! Open your eyes and take a deep breath. Remember you are dreaming and you can wake up.
3. Protection. Call spirit guides, guardian angels, patron gods, the works. In the AR, they'll all be there for you in your own realm, so if you plan on traveling outside your bubble, make sure they are able to protect you. Listen to any and all advice they give you.
This is based off roughly 2 years of AP experience until I quit a few years ago. If you need help getting there or have any questions, feel free to Mail me, just know AP isn't something to be taken lightly.