Companion Care Needed - Full-time / Part-time

I am looking for a senior caregiver that has existing access to Lakehurst Navy Base. My grandmother lives with me on base and is in need of someone that can drive her to medical appointments, shopping, the gym, restaurants, etc. She is starting to show signs of dementia and is lonely at home while I am at work. Ideal person has flexibility as this would be part-time or on as-needed basis. Perfect job for a military spouse looking for a side gig. Grandma uses a cane or walker as needed and is pretty independent for 89-years old. No help needed with ADL's or medications - just driving and companionship.