First, check if you are eligible under SF’s looser criteria.
If you are, ignore the state’s guidelines and check the box that yes, you do have comorbities. (This is specific instructions from a SF city supervisor.)
Then it will take you to page that says you are eligible and to enter a zip code. Regardless of where you really live, enter 94103.
Moscone will show up if they have available appointments. That happens about twice a week, so keep checking or subscribe to, for example, @CovidVaccineBA on Twitter.