In the end it is about just having fun and releasing what you can make. If you never joined one, there is always a first time.
As for the noobie thing... I mean, how noob are you? Do you have any basic idea of how your engine works, do you know how to export the game to release it on here? Or would you struggle to make an object move and interact with another?
If the most basic basics are missing, I mean, you can still try but I'd rather suggest learning the engine first.
I've seen people make single room games where all you do is jump over a few blocks to reach a goal and while that may not be impressive to the average player, it can be an impressive feat for you personally, you know.