What Should I Play After CF?

I played CF on my first normal play through. Not that I am a horn dog, but Edelgard and Dorothea are so charming. I tried not to recruit members from other houses, because I was hoping to get to know other characters when I play other routes.

But I made a mistake by playing my favorite route first. After playing CF, I felt so emotionally attached to every CF character, and of course, particularly Edelgard.

I cannot fantom the idea of killing “former students” or my emperor. But I must kill the one that I once idolized because she has transformed into a giant monster that threatens everyone else.

Now I am on Chapter 11 NG maddening CF and I feel like I am going to finish the game soon. At the same time, I feel I lack the understanding of the whole story and want to learn more about Fodland.

What route would you recommend me to play for my second play through?