Hi Emily,
acutally I dont know the core lessons - but from my experience as a guitarteacher it takes 3 -6 months till you are able to play normal chords ( openstring + barréchords ) more or less fluent. Specially the barréchords take the longest time till you get them done. But once you have all these thngs done then you can play and start to follow more indivual favours. :cool:
HP