The “User Manual” may be found online at the Cadillac owner web site after formal production begins. I doubt that the “First Edition” production, which started this week, will have the manual available now.
As for your other questions, visit or call your local Cadillac dealer for the answers. I will not put a deposit until I see and sit in a real model, so my purchase will be next year in 2023 as I stated above in my first post. I am not in any hurry to buy it.