Nursing, and care professions like teaching or ambulance drivers, can often be squeezed to rely on the compassion of the individuals in them.
Do you have balance within your position. Is it time to retrain for something else at night-school? Or time to go to 3 or 4 days a week.
Take some pride, every single day nurses help people to stay alive.
The Stoic Reading app on FDroid may help you find some philosophy that motivates or solidifies a purpose.
Travel to a different town and meet random people, introduce yourself using your middle name. Invest nothing in making long term friends, just chat.
You actually sound quite aware of many things around you, finding opportunities for hobbies or artistic endeavours, where you do not overthink things, would help.
Remember that everyone is doing their best with what they know, and to let some things go.
Box Stacker
A physics puzzle-game.
Join the sticky 'tetrominoes' to move a ball/box/car to the scoring zone.
Includes online leaderboard to view the solutions of players around the world. A faster finish with less total pieces is better.
Challenging and fun game, with a quality physics model.
https://f-droid.org/packages/net.artificialworlds.boxstacker/