Usual is a Haynes manual, about £25 from halford etc. But can get cheaper, try Ebay maybe £5. But if you ok about mechanical things, you should be able to figure it out. Might be more than needed 1st time, But you will know for future reference. OK too late to help you now but. Go for it, not difficult, just fiddly, make notes of what comes from where. I am all for diy, especially as most are fixed in a few minutes.
SD
August 2012