Probably every comment but install linux

Works in the UK (at least on a Google pixel) as well but not sure about other countries, is reliant on a Google account+Google services which are kinda privacy invasive

Also using Niagara launcher Wallpaper is my own picture, icon pack is articons

The closest is nextcloud collectives, tables, tasks and deck

I personally like Nextcloud notes for quick notes and nextcloud collectives for detailed stuff e.g revision. With nextcloud tables and deck it makes a great notion replacement