if you dont have access to an airline, removing the pistons can be hard work. other than that it is pretty simple.
remove pistons, sliders/pins and all seals. clean. refit with new seals and make sure the piston has no damage, ensure you use some rubber or silicone grease on the piston seals and some grease on the sliders. once you start, it is all pretty straight forward.
any online guide will give you guidance as they are all pretty similar.