What tablet should I get?

I’ve never recalled an ipods(the old ones), ipods(the new ones) iphones or ianything portable having an sd card slot

They have an adapter that allows you to connect an SD card into it, but it’s purpose is for importing photos (straight from a camera). Apple were never one for removable storage in their handheld devices unfortunately. Like previously said, they prefer to just make different capacity versions (16, 32, 64GB).