Sorry to hear. I think you're doing the right thing in trying to see if you can cope with lower stimulation gradually. Try lower stimulation hobbies, reading novels, going for long walks etc. Maybe you'll find that you can somewhat recondition yourself gradually. There really is a great joy in enjoying simple pleasures without distraction. Don't fret if you can't get there quickly or have a different baseline too, there's nothing wrong with being a certain way but, speaking from personal experience and general life experience, many of us seem addicted to things to one degree or another these days. Not least things involving screens.

Since you mentioned the word depressed, it can't do any harm to talk to a mental health professional too if you're concerned in any way about your emotional state. It may or may not be needed but that could also be a factor.