Transitioning to real songs


I’m hoping someone can offer some guidance around transitioning from the piano sounds to real world YouTube songs on chord crush. I can do all of world one up to level three on Chord Crush when I’m using the midi sounds, but I struggle with the most basic of the YouTube levels. It seems to be quite a leap from one to the other. Any tips for easing the transition? It goes from root position clean chords to entire songs with inversion, arpeggios and lots of other sounds happening at once.