If you need a better attitude to improve your life but you need a better life to improve your attitude, you need to solve for this chicken-or-egg problem to get going in the right direction.
https://yourmeaninginlife.com/blog/chicken-or-egg-problem-good-attitude-or-good-life
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