While I'm still using JKSM on the 3DS, I'll say it's very easy to get into Checkpoint on the Switch.
Press A to select Game title among a list of games,
then (I think) D pad left or right to select switch account to dump from
(note: saves no longer stored on cart, so you can have multiple saves legitimately, by simply having multiple accounts on the Switch).
Then you can click L bumper to dump, and R bumper to restore.
(you also get to scroll through a list to select to dump into existing or into new file on SD, or restore from which existing file on SD)
I pretty much got into it pretty easily with a few simple tries, without having to refer to any kind of documentation.
I think it's all pretty much on the screen