About the dream eyes questions: sometimes I slowly open my dream eyes right after the vibrations, but sometimes I just imagine that my eyelids become transparent, and I start the dream from there.

Either works for me, but I guess it's just a personal thing. The vibrations and buzzing sounds for me are the real indicator, and what follows can vary, but it usually results in a ld as long as I keep focused and proceed slowly and with caution (so I don't accidentally wake up for real lol).