Managing people is easy if you are personable and have the ability to adapt to culture and the people that comprise it. (managing 5 people is different than managing 20 people, which is different than managing 20 people in a different target industry)

Being a good manager also means shielding groups from other groups and making yourself the filter so you aren't wasting productive peoples times in endless meetings that are generally for other groups to show they are working to the wider company. You also have to provide a non-technical analysis of the internal state of the product/teams/tech to people outside your team. Those are the two hard things, everything else should be figuring out how you can make your team operate at it's highest levels without burning people out and hating their job.