User2288
Once you really get educated about what is happening on your current phone and computer, then you'll be so jarred that you won't be wondering why you should get this.
Agreed on this point.
Itme
Personally I would recommend reading books about happenings in digital surveillance to develop your own understanding and reasons for switching. This is not the easy / convenient path, and the average consumer has spent decades being spoonfed convenience and intentionally hooked on it by the corps to increase dependence and negative feelings associated with "withdrawal".
I think you will want your own homemade ideological convictions to lean on if the going gets tough.
IMO there are many benefits to reading books to develop a foundation, rather than articles / YouTube videos / whatever else floats around on the net (perhaps I am just a snob in this regard ^^).
Some books I would recommend:
The Age of Surveillance Capitalism (2019), Shoshanna Zuboff
Privacy Is Power (2022), Carissa Veliz
How to Destroy Surveillance Capitalism (2020), Cory Doctorow
Best of luck!