Buy or check out from your local library a copy of Chilton'* 28200 repair manual. It should have the step by step instructions for AC compressor R&R and much other useful information.
Assuming your system is already discharged, removing the compressor is a simple matter of disconnecting the lines and unbolting the unit from the engine. A couple of the bolts may tax your patience, but it is not a tough job. If your system is still charged, take it to an AC shop and ask them to discharge the system for you. They will usually do this with R-12 for free or for a small charge for R-134a as the refrigerant is valuable and can usually be recycled.
If you plan to remove the compressor rather than just replace it, you will need to buy a shorter serpentine accessory belt. Otherwise, parts-houses sell a compressor elimination kit which replaces the compressor with a similarly sized and positioned idler pulley.