This is not as intimidating as you think. I promise!  Check out the video below for how I fixed the Evaporator Fan on our GE Cafe Fridge.  If you have a different Problem or a Different appliance no worries.  Here's what ya do.... Google your symptoms on whatever appliance you are having trouble with.  I've done the same thing plenty of times trying to figure what was going on with my kiddo and I'll be the first to admit it lol.   So remember YouTube.com is your friend.  Then Check out a website like www.partswarehouse.com and look up your appliance diagram and parts using the model # found on a sticker inside the door jamb typically.  I've found parts on Amazon.com a lot as well so remember shop around for the best price just like you would for anything else!  Also if it ends up not being the right answer to your problem amazon has easy returns and free shipping. ;).  See easy peasy!  Just take your time and go step by step.  If you can raise a human child and run a household you CAN DO THIS!