support groups

i’m 17 and addicted to several drugs. i found some support groups in my area and was thinking of going to a meeting tomorrow. if i were to speak, would anyone report me to the police or something because of my age? there was no age limit on the websites but i’m quite a bit paranoid.

also if anyone has tried support groups, how were they? what are they liked compared to 1 on 1 therapy? what would you tell someone before they attended one? thank you !! :)