It's never been the phone for me, particularly. I just don't pick mine up very often.
To have much more time to learn things I had to learn one key skill: systematically lose interest in syndicated American television. Other people can watch Lost, Game of Thrones, How I Met Your Mother etc.; I will use my time elsewhere.
(OK so I picked three that are widely recognised as having a major letdown as an ending, but you see my point I guess.)
Once I stopped sharing an interest in watching every episode of some show that a friend or the general zeitgeist was obsessed with, that is hundreds of hours (per show!) for a hobby.
And these days it's hobby-enabling money, because in many cases these shows are the only reason to pick up an extra streaming subscription. You can buy a good 3D printer and some filament, or an electric guitar and a little amp or headphone effects unit for less than a year's premium plan for an American streaming service, and a fully playable guitar alone costs about as much as a year's standard Netflix.
I learned this long enough ago that I have gone without a television for decades now. I had to re-learn it in the era of streaming TV. If you think you want to see one of these shows, they will be around forever so you can watch them from a hospital bed one day.
But phone is still the worst offender, of course. It doesn't just steal time and energy, it also reinforces its usage by producing more anxiety