i know how you feel, because i felt the same thing for a while and sometimes still do if im chilling with the really popular kids(my sister is really well known around here...) but if you dont make it awkward then it wont be, that'll make more sense eventually
just dont try to hard, a simply hey or hello to someone you see occasionally. then the next time a hey, hows it going? then something like hey, did you hear about blah blah!? take it step by step, and if the person continues to talk to you then keep it cool and you'll get used to it. its not something you get used to over night, believe me
alright im done my quick lecture!