The best way to succeed in ap is to start Lucid Dreaming. Lucid Dreaming is the art of controling and remembering you dreams in a vivid way.
To get started all you need is a pencil and some paper or a notebook. Everytime before you go to sleep do a long meditation, But make sure you dont fall asleep. While meditating focus on how you wish to lucid dream, Then lay back and use your spirit guide. Afterwards just simply go to sleep, In your dream there may be some weird stuff happening, Dont worry this is common.
After you wake up write down everything you remember, Do it fast or you might forget. The following nights do the same but read what you wrote that morning. Once you can remember dreams without writing it down, try ap now. It will be more easy than before and you may succeed.