Setting limits would help, but you'll be left with time to spend off of your phone. While I can't help with setting limits, I can recommend picking up a hobby that pulls you away from it. That can be anything from a sport to crochet. If you have something else you want to do instead, you may find yourself naturally using your device less.
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opposite for me. if i have a phone or screen nearby i cease playing music instruments, excercise, cook food, woodwork, repair clothes, juggle, flip cardtricks, draw, read books, ...
You seem to be in the perfect situation to justify screen limits then.
However, I can't help with that sadly. I'm not on stock Android. It's possible on my Samsung device through parental controls, so maybe look for something like that?
interesting with parental control settings and digital wellbeing as mentioned in another comment
In the settings, isn't there a "digital wellbeing and parental controls" area? I'm pretty sure that's a stock Android thing.

funny thing is i checked it yesterday put every app on block
today it's 2-clicks with no wait time to un-block apps
The PieFed web UI has a daily limit you can set, btw. Doesn't work with apps but you can uninstall all the apps and use PieFed as a pwa which is very app-y.
I guess if it were effective then Google wouldn't provide it.
There is an app called App Block which is a bit more hard to get around.
Perhaps the key is finding things to do that are better. Volunteer work, study, get a dog, etc
exactly my thought
I have this printed out and stuck to the fridge
https://ktarlow.com/littlebetterzine/littlebetterzine-sixty-things-singlepage.pdf
