Manage your own anxiety before you start managing other people.
Don't worry about how people are getting things done, just that they are. People will often work very differently from you, and that's fine.
If you can't measure it, it probably doesn't matter. If you can measure it, make sure your team understands what the expectations around those metrics are.
When something isn't happening to your satisfaction, attempt to find the root cause. It's very often not what you initially observe/guess.
As a manager, think of yourself as a gardener. You're attempting to facilitate development and productivity. You'll have significantly better results focusing on that compared to taking a taskmaster-like approach.
