Basically the title.
New to the game, been playing about 6 weeks now and I'm wondering when and how I should start to narrow my agents to one or two I play with mainly.
I haven't unlocked everyone so is it even possible to know who I will be the best at?
I've been playing Sova mainly but maybe Viper is the one for me, who knows.

TL;DR - How did you choose your main and how long did it take you?