I'm currently working on the Black Forest Polka (p82). It's a fun piece, with lots of nice runs of notes up and down the keys, but I think it will be tricky to play them quickly. Next is the famous Elgar piece, which has two part writing included for the RH - scary stuff. I have tinkered with it and understand in theory what I have to do, but it feels like having 3 hands would be handy at this point!
I regularly watch 92pianokeys playing pieces from book 2, and of course she makes everything look so easy. Well, she's got decades of playing experience behind her so that's hardly surprising, but those videos are great for people who don't have a teacher, especially as you can play them at slower speed to study the fingering techniques. We are fortunate to have so many online resources to help us on our journey.
"Don't let's ask for the moon, we have the stars." (Final line from Now,Voyager, 1942)