Thanks for sharing your experience! Gonna try your approach too.
Can I ask you if you have a motion sickness issues? I'm interested if those are connected with nausea/dizziness from some of modern screens. For example I get very sick in transport: buses, planes, cars, except railway transport. And I can't stand the trips longer than 20-30 minutes without taking a pill.
I've recently purchased a refurbished 2018 11-inch iPad Pro and I get almost the same symptoms which I get from transport when using it (they're noticeably milder but still unpleasant though).