Amatuer Acting Groups

hey everyone, my name is Stefan and i'm keen to get into acting and try it out, im 18 and unsure what i really want to do in my life and i want to give acting a crack, i've always enjoyed acting whether it be theatre plays or drama classes.I wanted to know if there was any amatuer acting classes that i could join around eastern suburbs and which could maybe lead to more opporttunities, cheers