There is an awful lot of stuff on the WEB on how to do this type of job. Also, you can go to Home Depot or the like and look at installation instructions to see what's needed. Also, some of the Home Centers offer FREE classes on this type of work. I was in HD this past weekend and there was an over-head announcement that the 'class' was to begin in 5 minutes.
YOu can read about this at Hometime's Projects List. Click the Ceramic Tile URL and away you go! Do look into the classes too.