The Boxster is an easy car to do most things on, because it is built so well and there are so many guides. However, the reason you can't find a clutch DIY is because it's a big undertaking, and requires a lot. You're best bet is to leave that one to a mechanic.
If you are getting overwhelmed, search for information. Look here, on google, on renntech. You'll most likely find answers. I also agree with putting a few thousand away for repairs and investing in a Bentley Manual.
