I just came to realize that achieving my goals without happiness is wasting my efforts for no good reason. It drains you up and makes you a totally different person.

Little lad

I really don't want to go back in time.

Self Improvement is about actively changing yourself for the better. All of us mature naturally over time, but self-improvement is a directed effort rather than a natural maturing process. We not born perfect, but we can all improve ourselves for the better.