I'm not sure if this is the right place for this but if anywhere it goes here so here goes. . .

Including me I have 3 people (maybe) that want to play a game, I will try and get more people but I'm not hopeful, all of whom have (to my knowledge) never played a ttrpg before, to that point I'd greatly apreciate a suggestion of what to play. Hopefully one which falls under the following requirements:
-Free, & online
- Able to be played by 3 people
-Easy to play for first timers
-Hopefully GMless
-Light on dice.

Of course I'd settle for the first two.

I think the free version of Soap hits all your requirements. It's one of my favorite little free games. Shadows being another one, which also fits your needs.

maybe I should have mentioned that the group is currently composed of only teenage boys so...

I don't see what that has to do with the games I listed. They're both generic in the sense that they can encompass a wide range of setting and situation. I've played intense, Sopranos-like crime drama with Soap. The shadows in Shadows can be lots of things besides what the game text suggests. Such as demons, alternate personalities, and so on. All you need to do is provide the color in some flavor that appeals to teenage boys.

That is true. . .

I think I might try Shadows though with three dice, and have a good conterpart to the shadow to get a shoulder angel/devil situation. . . hmmm. . . I must think...

I'm a little late, but have you considered something GURPS Ultra-Lite. Without a doubt it fits all of your requirements. The entire game fits on a single sheet of paper, and you need a whopping three dice to play.  As a bonus, I have an intro scenario for the game online for free: The Liberation of Jorge Ramirez.  Mostly because I fell in love with the idea of a game that could be encompassed in a single sheet of paper, on a single side.