Everyday we learn. Learning is a nonstop excursion which should be embraced.
Any one who claims they know it all, actually knows very little. Everyday, whether we like to agree or not, we learn.
It could be as simple as observing someone pouring a cup of tea differently to you. That being, putting milk in last rather than first. Seeing things done differently is learning but most importantly accepting that there will always a variety of way of doing things.
Locking yourself in a “I know everything” is a limited place to be. So, rather than feeling like you know it all, take the time to notice what is around you and consider the fact you actually learn something every day.
And of course, take a course and really step out into the world of learning.