For facebook/tinder. I want to show my body and face since I've lost weight, but I don't want to seem too much as though I am "posing" for a photo

also i don't want to be alone to not seem antisocial. I'm not sure what all of the "criteria" are for a good photo. Any advice on how to dress, what setting it should be taken, should I be with a few friends etc. Would help lots.