I will undo my mistakes
What are the mistakes that you made that you want to undo?
There were some mistakes that made my parents no longer proud of me.
It's good that you've realized your mistakes and are trying to fix them. There's no shame in making mistakes so long as you learn from them.
Of course, like anyone, I've looked back on my pics and realised just how miserable and repulsive I looked.
Fixing your problems is a great habit to get into. If you feel like there are some things that you would like to change, it is great that you are willing to take the step to solve them.