I've tried something like that.

But I'm unfortunately prone to leaving my phone in my bedroom, so it never works out

When I'm trying to habituate to something by myself, I usually do okay by setting up barriers. Can't do X because Y is in the way, so I handle Y, and eventually I'll usually just start doing Y as part of doing X, where X is something I want to do.

It takes a few weeks but it usually does work.