We had a manual Yaris but older daughter struggled with this, so I bought a 2014 automatic Corolla for our two to learn in. However, but it didn't have the best visibility and I would always bang my knee on the plastic around the key.
I then bought a 2015 Yaris instead (so yes, we had two Yarises). They sit higher in the car so great visibility all round. As an NZ-new car it has plenty of airbags and other safety devices. Cheep to insure; it is the ultimate granny car but that makes it safe and easy to drive.
I went for automatic as it is easier from them to pass in and, once they got the full licence, they could drive a manual anyway if they wanted.
Good luck whatever you get - it is very rewarding helping to teach them.