People who insist on making all the decisions often find themselves discouraged and disengaged from the people around them. Worse, you may be missing key information and ideas.
No one person has all the answers. Don’t pretend that you do and don’t think you have to. Create a circle of trusted advisors that you can turn to with questions. Acknowledge what your expertise is and what it isn’t. Turn to those advisors when you have a question that is outside your experience, or to get a fresh look at what you are doing. Also, use these advisors to double check your own assumptions. More people get tripped up when they think they know something and it’s wrong, than when they know they don’t have the knowledge or experience.
There is nothing wrong with not knowing everything. It’s a sign of good leadership that you can admit you don;t.