Two tunes I am working on are After You've Gone and Ukulele Lady. They have quite a few chords and I needed to learn chords. I also already knew the melodies so that helped. Changing chords fast is still a struggle but it's getting easier. I found an old recording of After You've Gone by Coon Sanders Nighthawks (circa 1919) on YouTube that I can play along with. I think I'm going to break down and buy the song if not the whole album.