People don’t one grows up as a by-product of time passing.
Life is tough sometimes, and the times you grow up the most often coincide with shitty times.
Embrace pain and hardship, cause shit can always get worse.
The world keeps on going no matter what your internal state is though, so don’t give up trying to keep up.
Older people are more confident of their ways as they have lived long enough without having to change certain mannerisms, but that doesn’t make them correct.
Your experiences are your own experiences, and ultimately, in the core, you are alone and you are the only responsible party for your choices and actions.