Probably won't be doing anything too crazy because of parents and little brothers being with me haha. What would be some cool things to see besides alcatraz? Also cool food spots!
To keep it a buck, Alcatraz is just a jail lol. I would skip it unless it has some interest to you. San Francisco is a city of neighborhoods more so than a city of attractions. Being a small place (just 7 miles x 7 miles) you can jump from one neighborhood to the other pretty quickly. If you like street art and diverse types of food, go to my neighborhood The Mission. The Fillmore is a historic black neighborhood (with barely any black folks anymore smh), but there are still cool shops, restaurants and bits of history.
Go downtown to shop and catch movies. Chinatown is Chinatown. Pier 39 is a tourist trap but it you got youngins they'll have fun. If you're going to Alcatraz you'll get off the ferry right by there.
The Richmond has a Chinese and Russian Shopping area (Clement St). Japantown has Japanese restaurants and Anime spots (you could probably cop hentai if you want that too).
As far as specific types of food you wanna eat, I can tell you a spot for each type.
Don't buy herb at the downtown dispensaries, you'll get fleeced on the prices. If you're going to the Haight (the old hippie neighborhood) don't buy herb there either. Hit a spot in the mission, ingelside or Richmond/Sunset. Berner used to have a spot on Geary street, but I'm not sure if it's there anymore.
My only warning safety wise is that sometimes the hood and affluent areas are right next to each other, and there isn't a lot of warning of when one becomes the other. Let me know what area you're staying at and I can tell you what's no good, unless you want to buy hard drugs or just want beef