Ceremonial magick and ap are not mutually exclusive but they are different modalities to achieve different purposes. You can use ritual to affect the energy around you, or you can use p to go do something in the astral while your body does nothing. I guess you could use ritual to prepare yourself, but then what you’ll do is whatever makes you physically comfortable so that your body can sleep while your min stays awake. Meaning you can add an ap component to any ritual you like.
But there’s no ritual to induce ap, that I know if, if that’s what you meant. You’ve have to make one up. Maybe “I take a bath, I lay down on my bed and listen to theta 4hz frequencies on youtube through earphones”.
For really vivis ap you want to go deeper into lucid dreaming. There’s good work on how todo that here and the book The Phase is on amazon.