Casdin

Hi all im new here, Im interested in buying Arma III but haven't played the series before, my question is that I dont have any friends to play this with (None really play PC games) if I did end up getting it is it just likely that I would end up plodding around on my own gettting chewed up by groups of buddies running around together or is there some way I spawn with friendlies and can just tag along with them? :j: