there are a lot of books depending on what you are interesting in learning.
I teach stage management at the grad level, I use this text https://www.amazon.com/Stage-Managers-Toolkit-Communication-Performance/dp/0367406373/ref=sr_1_5?crid=19TZOMTEXDAUV&keywords=stage+manager+tool+kit&qid=1658071755&sprefix=stage+manage+tool+kit%2Caps%2C117&sr=8-5
In the end be a leader, fair, detailed orientated, work with the director to put together a show in a safe, sane and repeatable manner with the resources you are given.