You're not going to work for big brand companies in Silicon Valley, because they use alma mater as one of the few legal mass filters.

That's not the end of the world. Learn, enjoy, don't be an asshole, build bridges to other people, and work hard and you'll be fine.

There's a saying/proverb that I'll butcher... a lily is an incredibly beautiful flower, but it only grows in the muck at the edge of the lake. Be the lily.