I am Blind, please help. Ableton Live with Arduino Mega 2560

My kids helped me build this controller made for Ableton Live. I uploaded some MIDI sketches to my Mega 2560 but no controller shows up in Ableton. I am legally blind so researching things is very difficult. Hoping that someone has a sketch that might work and what the steps are to get it to work in Ableton. I am connecting using a USB cable, not a MIDI port
Thanks