I was 22 when I moved out of my parents house. I had about $1000 of usable cash and $5000 credit to fill up the apartment with necessities. (I warn you against doing such; if you don't spend wisely that credit will hurt you in the end with debt.)
I am the "breadwinner" of the household, with my income ~$800 biweekly and my fiance ~$600 monthly (she is a college student).
It's been close to 2 years and although times get hard we cannot imagine willingly going back to our previous living situations. Not that they were bad, it's just hard losing the sense of freedom once you obtain it.
If you are thinking of doing so, it can never hurt stockpiling cash until you have more than enough to cover deposit, necessities and I'd say 3-6 months of rent. Worse case scenarios happen far too often, and usually without enough warning. I love in Northern California btw.
P.S. You will most likely have to borrow, more than once. We have all been there. You aren't the first and will not be the last. Don't beat yourself up about it when you do.