Elderly Care Sitter/Nanny needed

Looking for someone to assist with my 85 y/o Nana a few days a week. She is able to get around for the most part on her own, but she does need supervision and a hand here and there. We are looking for someone who can drive her places, run errands with her, take her to church sometimes, Dr appointments, help around the house with daily chores, prepare or pickup her food, sit with her, help her shower when needed (though she usually doesn't require help). Required experience with elderly care and a background check & references. Prefer a gentle demeanor, but also someone who isn't sensitive or afraid to speak up and stand your ground. We are currently thinking 2-3 days a week and this could change depending on the week, her health and how's she feeling. Some week it may be two days, some weeks maybe 3. It may be Monday - Wednesday or it maybe Tuesday & Friday, so we need someone who is willing to be flexible.