If you want to see San Francisco then Oakland is a good place to be. Easy transport by the BART into and out of SF. Jeri’s place is a 10 minute walk to the station. The train cost $8 for a round trip and no hassle. A good tip is to use a taxi to get around the city, it is not expensive and the drivers are normally helpful.
Have a great time and pre book any attractions as you will get it cheaper. Your first day in the city should included the bus tour as it paints a picture of the city.