I like these lecture notes: https://staff.math.su.se/anders.mortberg/papers/cubicalmethods.pdf https://staff.math.su.se/anders.mortberg/papers/cubicalmetho...

I like these lecture notes: https://staff.math.su.se/anders.mortberg/papers/cubicalmethods.pdf https://staff.math.su.se/anders.mortberg/papers/cubicalmetho... But if that is too hard to read, I recommend telling Anders directly when you get confused. He is open to improving the notes.