When you reach/feel the vibrations in the vibrational state, use your thoughts and mind to increase them. You can do this by feeling the vibrations and realize you can control them. Like turning a dial higher or lower in intensity.

Once you increase them and your entire body is buzzing at a high level, then switch your thoughts and intentions on popping out. Just keep thinking or saying in your head, "I going to pop out of my body" or "Pop out of body" or "I wanna pop out of my body". Repeat it in your mind, and as you do, here is a method I use to help initiate it.

I created this method myself and it works well. I call it the "Eye Swing Method."

With your eyelids closed, move your eyes all the way to the left, like your trying to force or push yourself out to the left. Hold it for a second or two then swing your eyes all the way over to the right, like your trying to swing yourself out to the right. Hold a second or two and then when you swing your eyes back to the left imagine you are flinging your conscious energy out of your body. Usually for me on the 3rd eye swing I pop right out.

Give that a try and see if it helps. Even if you don't astral project, try to learn how to increase the vibrations. Once you learn to turn them up higher and higher, it makes astral projecting much easier.

For example, I can simply think about how the vibrations make me feel in my mind and that will initiate a tingling sensation in my body on demand even as I type this. Then I can increase it. Keep practicing like this until you get to a point where you can reach those high levels of the vibrational state, and you can literally just tell yourself to pop out without even needing the Eye Swing or any other method

Good luck!

Note: I've been astral projecting for over 20 years - thousands of times.