Not quite the same, but this is what I wrote when I decided to stop drinking:
[1] https://taylor.town/1000-weekends
For quitting apps, don't use willpower.
Delete the app and ask somebody you trust to set parental controls on your phone (to prevent you from reopening another account, etc.).
[2] https://taylor.town/parental-self-controls
Cal Newport's Digital Minimalism is a great book on developing a healthy relationship with social media.
IIRC, he recommends doing a 30-day "fast" and then slowly reintroducing technologies that have a clear benefit to your life.
For you, it sounds like quitting Twitter now and then finding sources of news later might be a good move for you.
[3] https://www.amazon.com/Digital-Minimalism-Choosing-Focused-N...
Consider setting up an RSS feed!
You can use Kill the Newsletter to convert emails into RSS feeds too.
[4] https://kill-the-newsletter.com
I was just listening to a podcast episode making the claim against "staying informed". Some great points in there.