I agree, Sean! Caitlin's course is wonderful. She teaches a variety of songs (reels, mazurkas, polkas, and more), and for each tune she has a variety of resources: a video lesson; an audio track you can speed up, slow down, or even loop to repeat various phrases you want to play along to; sheet music in notation and another version that simply has the notes written out in letter form. She addresses air control, too, and as Sean mentioned above, shows you alternate buttons for different notes to optimize air control.
I hope your playing is going well, Helen!