God I tortured myself growing up thinking that once I achieved the next big goal I would “be happy”. I don’t know why it took me 30+ years to realize that state was never achieved, I just have to be happy now without waiting for it to happen to me.
Walking and talking are pretty ancient ways of taking stock and finding new perspectives. Talk to people outside your usual age range and social class. Get out into nature. These things usually help in ways I can't explain very well, but I find them vital to sustainably integrating who I am in here with where I am in the world. In my experience, major health crises of the mental kind tend to be down to this.