I believe in continuous and strategic learning. We will never know everything. We will never be truly perfect at anything. This may seem a little intimidating but, in fact, I consider this to be absolutely empowering.
Think of this: anything that you are not good at CAN be improved. And even better, you can improve yourself today! There are free resources - from the internet to even the public library.
The key is specific and pinpointed learning. To identify specifically what you lack or what would benefit you the most in your current situation.
Find books, videos, coaches, mentors, or whatever you can find that addresses your identified topic. Given the breadth of information available, I have no doubt you will find what you need regardless of unique.
The point is: there is no reason why you cannot become better or more educated today than you were yesterday.
Here is a video that talks specifically about this: