a course might help you a bit but experience with other great tilers is the way to go i reckon,in 20 years you'll still be learning new trick so don't panic,i'm learning quickly and my confidence is very high,3 years in and i was showing a
tiler of 8 years how to tile around a bar yeaterday and ended up doing it myself,he had even won a trade competition !!!! but i'm always watching all tiling everywhere,even when i'm out shopping,lol. great fun.
Joe.
come on the toon