Senses Initiated Lucid Dream (SSILD)

Hey Cosmic .Iron,
Welcome to this forum,
I have quick short three questions.
a) Is it mandatory to sleep immediately after doing two-three rounds or we can sleep afterwards?
b) Should i silence the thoughts in my mind while doing these cycles or can i ignore thoughts and also whether can i ignore thoughts of excitement, which sometimes prevents me from falling asleep quickly, after doing these rounds?
c) Should i look for real sounds/ sensations etc while doing the rounds or should imagine sounds.sensations?

Thank you!!!