Nanny Needed For 1 Child In Napa

My schedule will require me to find somebody preferably long-term for only a few days a month, for a few hours at a time, with intermittent care during holidays and breaks. I'm a single mom going through a really nasty divorce with a co-parent who drops things on me last minute and I have just taken full-time employment. I need somebody I can depend on and trust with my child as I don't have any family left and my commute is 46 miles one-way just to retrieve him from school which I can no longer do on days that I work. Occasionally would need the person to prepare snacks for after school and help with first grade homework, which is usually just going over a list of spelling words and 20 minutes of reading during weeknights. On Fridays, homework would not be required, just fun until I can arrive home. Some transportation would be required.