You can't change the world overnight; all you can control is yourself, so do whatever you can to have a positive impact on yourself and others, which will begin to change your life and improve the world around you.
https://yourmeaninginlife.com/blog/change-yourself-change-the-world
You can always find a reason to complain, and you can always find a reason to be grateful. The former will lead to a miserable life; the latter will lead to a more pleasant life.
https://yourmeaninginlife.com/blog/it-will-always-be-something
There are many misconceptions about how important growth is to your life, from what kinds of growth are possible, whose growth is meaningful, and how growth is meaningful even in the face of endings and death.
https://yourmeaninginlife.com/blog/misconceptions-about-growth-oriented-meaning