Here is a short aphorism that everyone should remember: One may do anything, but not everything!
You are finite being and do not have enough time to try, much less complete, everything. You cannot read every book, see every town, or have a pint at ever pub.
The solution is to choose well: focus on quality, not quantity. Do what you love. Develop your strengths. Concentrate on those goals that are most important to you.
Never feel guilty about not being able to do everything as it simply is not humanly possible.