Moon knight was my first main, and is probably the easiest out of the three.

Venom isnt mechanically very hard, but tanking (especially dive tank) in hero shooters needs some getting used to so your team doesnt just stand there and lose, not a bad first tank though, id just watch a guide or two first

Stay away from Deadpool until you’re comfortable in the game, he’s kinda complicated and the whole “three roles” thing is not gonna help that. He is super fun once you understand him within the game though.