[2019] Returning player after 1 year, guides for class builds?

Hi,

So, as the title might have told you I'm just returning back to the game after a year away from it.

I have a new account, wanted a completely fresh start. I'm level 5 in every basic class, except specialist which is the only one I've played with for the past couple days.

So, to my question, is there any youtube guides out there that goes through the absolute best weapons and cards to use? I've searched myself, but I'm not sure how much the game have changed so not sure if I can trust guides that are ~6 months old.

Any help is appreciated. :)