This was a nice succinct writeup. On the topic, here are some books I'd recommend for ICs making the jump to a manager role (or thinking about it):

1. The Making of a Manager (https://www.amazon.com/Making-Manager-What-Everyone-Looks-eb...)

2. The Manager's Path (https://www.amazon.com/Managers-Path-Leaders-Navigating-Grow...)

3. Crucial Conversations (https://www.amazon.com/Crucial-Conversations-Talking-Stakes-...)

4. The Coaching Habit (https://www.amazon.com/Coaching-Habit-Less-Change-Forever-eb...)

5. The Five Dysfunctions of a Team (https://www.amazon.com/Five-Dysfunctions-Team-Leadership-Len...)

I'm still due to read High Output Management (https://www.amazon.com/High-Output-Management-Andrew-Grove-e...) and Extreme Ownership (https://www.amazon.com/Extreme-Ownership-U-S-Navy-SEALs-eboo...).

A peer of mine got invited to become a manager and was concerned about being ready so she scheduled a meeting with me and these are her notes cleaned up.

The first thing I told her was that if she thought she was truly ready--this will be no-big-deal kinda ready--to be a manager that would have been the first indication that she might not be ready.

This was a need reassurance and she is doing wonderfully.