Ideas are more important than age.
Just because someone is junior doesn't mean they don't deserve respect and cooperation.
The Eng Team Handbook - Developer's guide to management: an open-sourced handbook for leading engineering teams.
Manager's Playbook - Heuristics for effective management.
How to Operate (2020) - Keith Rabois Breaks down operational excellence.
Four Keys - Four key metrics that indicate the performance of a software development team.
Engineering Ladders - Framework for Engineering Managers.