Seeking Full-time Senior Care Provider In Belvedere Tiburon

I am looking for a caregiver for my wife that has early stages of dementia. We are looking for a woman, my wife likes to walk and work in the garden. She has all the physical capabilities, such as walking, eating, bathing dressing no problem. A companion is probably a better term to use. She does not have a drivers license and will need to be taking shopping and various doctors appointments. We would like to have somebody that is familiar with Marin county. We have a studio apartment above our garage with separate entrance.