That's life unfortunately. As a dated BE speaker I would not use class, I would use lesson. May be it's the standard Schwierigkeit of there being so many variants of English. I think it has to be "diggin" the colloquially shortened form for "You are digging," or at least https://codyjvlyp.thekatyblog.com/32537744/untersuchen-sie-diesen-bericht-über-music