Well I'm gonna have to ask a family member then.
There are really only a couple basic rules to working in your computer.
- Make sure it's powered off, battery removed and unplugged.
- Make sure you are not carrying any excessive static charge on you (You can discharge your static electricity by touching a piece of metal that is grounded, like a metal faucet that is connected to metal piping)
- Don't try to yank any pieces out unless you know how to lol
- Make sure you remember where each screw you take out goes, it's good to group them.
As long as you follow those, you shouldn't have a problem. Since it's a laptop, taking it apart can be a bit of an ordeal. I recommend searching for "<Your laptop's model number> Maintenance Manual", it'll be a huge document that has steps for accessing each 'assembly' of the machine. You'll need to get to the "Fan Assembly" in order to clean it. Refer to this video.
https://www.youtube.com/watch?feature=player_embedded&v=OpCJzdWxEbQ