Hope this is the right place to ask. How the hell do I progress the contract tier of an agent? I've played countless games but it still only says 0/75.000 XP when I check the Tier for Reyna. Sry, I'm still fairly new at the game.

I've currently been solo queueing games and on a big loss streak, I was wondering what would you consider to be the best agent for solo play and still be able to help your team out?