I am the same! I have major anxiety and I’m afraid that I’ll yell and be that bad parent so I go places with my husband with my son. Sorry I didn’t see this sooner but there is so much you can do! Go to Balboa park, liberty station. Coronado! Seaport village!
They also have Play city in Chula Vista that’s nice!
start by going to the park or a museum, ill take my son for running errands and he loves it, either with me or my husband, it's not really that scary once you start doing things, I've flown and traveled with my son alone over sea's, it's the same as being at home, just somewhere else, what are you anxious about? maybe that will help with giving tips
Tiny Tiger or the Children’s Museum. It’s enclosed and the workers are nice.