Hold up so you don't know stuff about guitar but you agreed (or possibly volunteered) to teach a guitar class?
just get lighter gauged strings, its better in the Long Run
Is this electric or acoustic? If any have fun and don't be discouraged by the pain or lack of dexterity and precision.
work on developing calluses
I already have 2 on my big toes LOL TROLLED
Follow up advice: learn to play with your feet?
pro tip: get rocksmith 2014 on PC