Thats a pretty big job. It's driven by the timing belt and therefore the timing belt must be removed to replace the water pump.
If you dont have the tools or experience to set up a timiung belt properly i would strongly recomend a reputable shop or dealer do the work. You can do serious and expensive engine damage if the belr is installed incorrectly.
I'd also recomend going ahead and having a new belt installed while your there. Cheap insurance.
Best of luck!
