Day 1: Check out the golden gate bridge! It'll take a while to walk across and get photos on both sides. Depending on the weather, you might need to come back another day for better pictures. Check out Presidio park: https://www.presidio.gov/
After spending the day walking around the park, go to a nearby Grocery Outlet store for some cheap snacks and good food to cook for the night.
Day 2: Pack some of those snacks from Grocery Outlet (grocery stores all around town) and drive up to Muir Woods. You'll probably pass the golden gate bridge again, and get better pictures with better weather. Spending the day at Muir Woods park. Pretty flat to walk through but LOTS to see. Save money by eating sandwiches on benches along the way. Enjoy the silence of the forest!
Long day? Hungry? Go down to Fisherman's Wharf and eat a big bowl of chowder. You won't regret it.
Today we went to a Juneteenth Celebration at a local library!
Day 3: Downtown SFO. Drive up and down those hilly streets if you have a car. Otherwise, take the cable car. It's ok to be touristy here and have people take pictures of you.
A few cool things to do here include checking out ALL of the murals and graffiti in the mission district. Spend hours upon hours and even join in on some walking tours.
Here are some ideas of what to do! https://theculturetrip.com/north-america/usa/california/articles/top-10-things-to-do-in-san-francisco-s-mission-district/
Eat some Mexican food! Pick the restaurant with the longest line and eat something other than a burrito.
Spend the evening in Chinatown. The markets include spices, fish, fruit, and candy that might be brand new to you. Lots of desserts and bubble teas to try here. I was excited to buy a new fan for the hot weather.