I transitioned from software engineer to engineering management 2 years ago. It was by far the most challenging (still rewarding) moment of my career. I was lucky to have the opportunity to build up a team from scratch to take over the services and architecture I designed, developed and operated.

Biggest lesson learned: you're no longer the decision-maker on your technical stack. Your team is responsible. Still, you’re liable for the result and its impact on business. That duality is hard to reconcile for former engineer. The solution? Build a culture. Better: create the conditions for a sustainable culture to emerge and persist.

That insight, and many other advices for new managers are compiled at: https://github.com/kdeldycke/awesome-management