Get offline. Step outside. It's fine.
Unplug from the 24/7 news cycle. They get you hooked with constant fear and outrage. If it's taking a toll on your well-being, you must disconnect. You can't influence any of the hypothetical things you're talking about by yourself anyway.
(Some limited time catching up on the news before voting is both acceptable and sufficient.)
I mean that sincerely, but it sounds snarky. Nuclear weapons has been around for like 80 years and influenced global peace. News optimization function is for you to want more of it. The world is constantly changing. If you want to worry about things you have close to zero chance to influence you have so many better options - singulary, bio engineering, self replicating nano bots, great filter, windows 11, climate.
Sapiens: A Brief History of Humankind by Harari is a fun read, much better than news (which btw, are really hard to come by if you would like to get some insight about what's happening and not just be fed propaganda - kind of disappointing how much there is of it on our side)
- Join a gym
- Buy a bycicle
- Move to another city
- Get a new job with 20% salary increase
- City services finally covered that hole in my street after 3 months
(ie anything)