You won't necessarily begin to "see" right away, especially at first. Next time you feel floaty but can't see, try a firm affirmation like "Clarity now!" Or imagine your astral eyes opening.
Sounds like you had a great experience! I remember my first exit sensations. I passed through a tunnel of light and then felt vibrations, like you described. The familiar feeling was probably the result of having projected or died many times in the past.
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