Babysitter Needed for my Children

I have a 11-year-old Girl starting middle school. she is independent, so the care is mainly for my 10-year-old son who is Autistic, but fully functional and independent. I'm a single parent working mom. Looking for a Nani that can just be at the house for when my son gets dropped off. It will just be receiving him, and warming up the already prep meals for him them to eat. So the ideal work time is 3 p.m. to 4 p.m. My son will be getting dropped around 3:15 p.m. and my daughter will be coming in around 3:40. I leave work at 4 p.m. and work near by so I will be home anything between 4:15-4:30pm