Can you tell me about San Francisco?

I am thinking about moving to San Francisco for a few months (January-April). I have a few questions:

1. Where to live. From my research, it seems that it’ll be cheaper to live in Oakland or Berkeley. Just how far are they? Is it an easy commute? I have no car. Is it indeed cheaper?

I also might be able to stay with a family in Noe Valley. Can you tell me about this area?

2. My primary source of income (trust me, it works!) is as a street performer. Are there a lot in SF? I heard something about the Fisherman’s Wharf.

3. Is the city bikeable?

Thanks! Any advice is much appreciated!

(22, female, by the way)