Help

I need some help with my ekko mid, I've been losing to many games mid trying to find a champ to use. I used to main Fiora but I've ended up inting to the enemy top laner and just gave up on top, of course I'll still play it trying to find a champ to use for it but I feel like their is no better champ for me then Fiora. Tell me things to make me a better ekko mid and fiora top.