ME! It's easy. First, you need to open your computer. Then, locate the current RAM. If you are replacing it, just pull back the 2 white clips, and put the new chip in. Make sure it is nice and secure with the white clips. If you are adding, just place the chip in another free slot.
It is very easy to do even if you haven't done it before. Don't worry about messing things up because the RAM can only go in one way.