I’ve done a few of these. Home Depot has the rebuild kits as well, so does Amazon.
Here is one of many videos on how to do it. Shut the water off and everything will come apart. One thing I did is to make sure to cover all threads and internals with silicon grease. It takes a little trial and error to get the handle to feel “good” and not too stiff while also making sure it doesn’t leak. The trickiest part is putting the little springs and rubber gaskets in the back. Good luck!