No its not hard, can be difficult removing the pistons. I use compressed air but be careful of your fingers, friends or anything else they can fly across the shop...just wrap a towel around it . You will need snap ring pliers and basic tools. Most manuals call for silicone grease upon re-assembly. The master cylinder is really easy, the caliper will take a little time. Make sure to clean the grooves in the caliper very well, your new seals will not fit.  Use brake clean not carb cleaner. Have fun use and  the manual.