I don't know where OP lives, but where I'm from Telegram groups are generally something that tends to work out better than Dark web. I sometimes buy from those TG Groups and never got scammed so far, got scammed from one of those darknet shops (or the feds just grabbed the letter)
Biggest plus with Telegram is, at least where i live, you meet with those people, they give u ur stuff and u give them the money.
Biggest risk with both is the quality, especially with percs/benzos/opioids chances are high u gonna get some bootleg stuff. So i would probably buy more than needed, after the first try to see if the stuff even works at all, just to be safe.