I'm having trouble Astral Projecting...

Hey there people!  :)
This is my first post.

I really want to Astral Project, but i'm encountering some problems. I've tried listening to bin-aural beats with stereo earphones in, and it gets me really relaxed, in a trance even.

I have a few questions, if someone would kindly take some time to answer them:  ;D

1. When in that state where you find it hard to move any part of your body, what do you do next in order to get into a projection?
2. What is this state called where you find it hard to move? Is it sleep paralysis? Although I don't hallucinate...
3. Is it normal to twitch in this state? Because I do.
4. I know they're different but can you explain the difference between astral projection and lucid dreaming?

Thanks in advance!!!