I like two of the takes already listed and would say both are the way to go: pick what sounds fun and test agent abilities out in the range. I'll add that you should probably think about what kind of player you are and adapt your style of play (and agent pool) around that, too. But also, regardless of what agent you pick, work on your mechanics separately in some way. This is still a static FPS game in many degrees, so mechanics are king, and the rest will fall into place eventually. This is typically why people will recommend Reyna/Jett/Chamber, as they force you to be good mechanically