For me, it's hard losing a sense of mastery/competence. Solving problems gives a sense of accomplishment.
The social aspect is quite hard, as I got along well with my colleagues...
2 months since early retirement. I'm struggling a bit to be honest.
I'm single, mid 30s. Most of my friends are very career driven so it's hard to relate for them, starting to feel a bit isolated... Feeling a bit bored, spending too much time on my computer (default activity for me)... I'm putting pressure on myself as well to do "stuff", but end up procrastinating because I don't have a great idea on what to do...
I listened to these 2 podcasts by MadFientists which resonated with me:
https://www.madfientist.com/cal-newport-interview/ -> talks about the sense of mastery
https://www.madfientist.com/tony-interview/ -> he went back to work half-time