theres two teams, aliens and humans. youre either/or.
you should prolly try story mode so you get the hang of the controls
i didnt even know there was 3 different bombs until months into the shit
and you cant shoot someone in the face for 5 seconds because the gun jumps and theyd consider that a headshot
id play but i got work in the morning bout to bounce
edit: and shooting people in the right spots will hurt them more. if u reload your gun perfectly you get like faster shots and more powerful shots
but you gotta get the basics down before you jump in online shit, or play horde..cuz most of us know where everything is in the game cuz its been out..but youre new