The odds are not in your favor.
You would first have to find a replacement LCD and that would likely have to come from Nikon.
Next, you have to find out how to open the camera, they don't make it obvious how to do that.
Then if you have the dexterity of a watch maker, you can probably be successful.
Once you look inside of a digital camera, you will be surprised how crowded everything is. Sort of like putting 4 pounds of stuff in a one pound box.
I managed to somehow crack my camera's LCD screen, (which from what I've read seems to be the most fragile camera screen ever) and I was wondering if it would be better for me to replace it somehow (if so, could someone tell me how to do so) or to just go ahead and get a new camera. Its a Nikon Coolpix L18 Digital Camera.