If you are unsure because you don't have enough information or haven't thought it through, it might make more sense to take time to think; if you are unsure because only experience will tell you what you need to know, then action might be a better approach.
http://yourmeaninginlife.com/blog/when-to-think-and-when-to-act
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