I want to bring to your attention a great book, A Guide for Caregiving by Tina M. Marrelli, RN. Marrelli is an RN who has written extensively about home health care nursing for nurses. Her books have been considered as bibles for home health care.
This time around she has written a guide to caregiving for caregivers. Marrelli covers the basics of caregiving and then delves into some specific care issues for diseases such as Alzheimer's, COPD, Cancer, etc., and cargiving issues such as caring for bedbound patients and providing incontinence care.
It's very easy to read and follow and covers all your questions. The American Journal of Nursing awarded the book 3rd place in its 2017 Book of the Year awards. It's truly worth your while!