Giving feedback is hard. Unfortunately, feedback is essential in developing and becoming the best we can be. No one ever reached their full potential without receiving and acting on feedback. As a manager, the development of your team is one of your responsibilities, and giving feedback is a major component of that responsibility.
This video gives some suggestions of things you can do as a new manager (or even an experienced manager) to improve your ability to deliver meaningful feedback. Giving feedback is hard, but when you come at it from the perspective of the individual receiving the feedback and their future, it can make the discussion more effective and smoother.