I’m 21M and I have a business idea but don’t feel confident about my skills.

I’m 21M and I just finished my 3 year Grad in Business Administration 6 months ago. I have foundational knowledge in Finance, Marketing, Sales and Accounting but don’t have any sort of skills in any of these fields. I have some business ideas but I have no clue how to take them from an idea to an actual business. I feel first I need to develop solid skills relevant to business and entrepreneurship before I put my money and time into it. Say I dedicate the next entire year to improve, what skills should I work on? What are the most essential skills required to be an entrepreneur?