cambelt DIY

In my pursuit to get some practical experience , and to save some money I am thiking about changing my cambelt with no more then my "rather small I supose" theoretical knowledge, basic tools and a Haynes manual. Ive read some tips here and there. I am very aware that I can ruin my engine if I get it wrong. A. is this wise? B. did anyone here find themself in the same situation? the car is a vw mk3 golf gti 16v with the ABF block would the 16valveness make it any harder? I am also thinking of changing the distributor. same questions previous experience: changing :air filter, oil, oil filter , spark plugs... kids stuff