As I test Ubuntu, Edubuntu, Linux Mint, KDE Neon, Zorin, MX, Chrome, Fedora, Elementary and BIG LINUX. Surprisingly , the easiest are 1 Big Linux, 2 Chrome and 3 Linux Mint. This test are not done with me but with my elementary / primary students during my computer class. Chrome they are just familiar but Big Linux they told me that it is so easy. I think Big Linux is locking of exposure in terms of real test subjects. Not done by us Linux users as we use it as our daily driver.