FDA publish many guides but also training material online. They have several videos explaining the regulation and implementations but also PPt in all kind of subjects. At below link you find some of the material. A good starting point! Unfortunately they withdraw the gudie for small manufacturers with examples on how to meet QSR. This can howeveer be found at other placed.
https://www.fda.gov/training/cdrhlearn/?utm_source=Eloqua&utm_medium=email&utm_campaign=DICE%20Quarterly%20Newsletter%20-%20Vol.%201%20Issue%201