It is difficult, when compared to some other manufactures for replacing the LCD.
You have isight camera cable, + the other ribbon cables, power cables, antenna cables, tiny connectors that can break etc.
Take your time is the best thing I can say I guess.......
The reassembly.........This should take you a long time too. Something in the wrong place can be bad. (pinching a cable into the frame etc)
Make sure and have good quality tools........I use Wiha ESD model tools not expensive if buying what you need
......use small paper dixie cups with numbers on them for each step of the process, to hold the screws etc.......this will make your life easier.
A work space with a lot of direct bright light and space......
Thats about it i guess.....
This site's dedicated to doing your own repair so I can't really say if you should or not.
If it's not something your comfortable doing and you don't have the tools for, maybe not?
If you can sell something on ebay, if you mess it up, it wouldn't be the end of the world, sell the parts on ebay or put it back together and sell it online or locally.
and of course make sure the LCD screen is the problem if you haven't already.