Rachel, the hardest thing to find in the bay area is "Good old American food". You can find almost any ethnic variation.
My sightseeing advice consists of Muir woods, Tennessee Beach, over Mt. Tam to do
Stinson Beach, Tomales Bay and on up to Olema and the Inn, then cut back to San Rafael. It’s world class, and doable in 1/2 a day.
The east bay-Albany, Berkekey, and North Oakland are accessible over the Richmond San Rafael Bridge. Worth a day trip. Traffic is horrendous in SF proper, and bridge tolls will give you sticker shock.
Just read about these twin places in Larkspur too. Looks like it’s up your alley.