Hi @Lianneevans1! Welcome to the Community!
I might be biased but I do believe Square to be very user-friendly.
Other sellers can feel free to chime in on this but we do work with all kinds of different sellers and we do our best to make sure everything is easy/straight-forward.
There's a lot in our Support Center as well about setting up and getting started if you're interested in taking a look.
Very user friendly! That's why we chose it! We've been using Square since 2012 with a lot of employees from age 14-65, and everyone catches on almost immediately.
It's super easy and intuitive, just tap the items you want to ring up, and press charge, and you're done!
The Terminal is an alphabetized list view, and Register/POS have a Customizable Grid View, so whichever one works best for you, go for it!