You're still here, still in the same situation. You simply know your in a simulation that's all. Simply knowing it isn't going to suddenly given you super powers and somehow mean you can escape it. Like the universe you are the simulation, you aren't separate from it.
I don't see any of this changing should I discover I'm in a simulation.
The default assumption seem to be that it means our reality is essentially code running on some strange alien computer, something easily comprehensible which behaves like the Matrix, but that seems far too anthropocentric to be likely.
It would imply that our universe was designed, though, and that it appears to exist with intent, and would be incredibly annoyed that the theists appear to be half right, but still satisfied that they were half wrong.
If reality was really implemented on the rocks from that one xkcd comic, would it be better or worse compared to a computer simulation?
Completely useless topic to waste time and brainpower on.