None what so ever. Whether you get the game on day 1 or on day 360, it all depends on YOU.
If you are no good at FPS, then you will of course be at a big disadvantage playing a FPS game. If you are even slightly good at FPS, then you will be just fine. Do as you wish and don't feel pressure to get this game on release day just because little Johnny on the spot is tormenting you.