Most first-time managers have already read a lot of advice about being humble, delegating, celebrating your team’s wins, and the other feel good topics.
If you want to write internet advice that gets upvoted and shared you almost have to avoid the difficult conversation topics and assume that the team is full of perfect people that the manager just needs to serve.
I’m in a semi-private peer group for managers and the number one most common struggle for new managers is their first encounter with employees who aren’t working unless a manager is standing over their shoulder, or who are causing problems within the team. Books like “The Managers Path” can help, but in my experience the best help is to find a more experienced manager you can talk to for advice. A lot of the difficult realities of managing people are messy or even painful and are often intentionally avoided in feel-good internet advice.