About "the manual"

I’m still feeling new to SCS as I’m only in month 2! I think I understand the reference to individual people’s manual but feel like I might have missed either a podcast or a month that goes over this? I hope I didn’t miss it in March or April! Could you point me in the direction to have a better understanding of our “manuals”…I did a search in the questions and I didn’t get what I was looking for!
Thank you,