Baby Bird, help?

... so I need to know: What does it eat? What should the "nest" look like? What bird is it? Here is the picture that seems very like it: http://www.starlingtalk.com/inthenestpics47.htm

Why isn't it playful and vocal? It might possibly sick, I don't know, but I read symptons for it on a website, and some of it applies to it now. I don't think I can take it to a vet. When will it fly? (seems 2 weeks old right now)I read on a website that a wild bird should not interact with humans as much as possible, I also need to know ways. I know I'm very inexperienced, but I am unsure of it. And on a sidenote, how can I find the nest? There are some birds of the same species around this area. The chirp is about 1 sec long, clear and loud and it doesn't seem to sing either. What can I do? I should send it to a WIldlife Rehabilitor but I don't know any around my area (Diamond Bar, Los Angeles region, California) so much help. I'm 12 years old, so that's why you might ask I don't know much about it.

I know this is really long, but please bear with it. I'm hoping as much details as possible may help you... It is small, I would say 4 inches wide from the side, 2 - 3 tall. The website says that they should eat some dog food as a formula because of the protein and fiber. I'm pretty sure that seems weird, but the website is a rehab center. The poop, right now, is yellow,white, and surrounded by clear liquid (seems like water). It does not open its mouth wide and big for feed, so I have to use my fingernail to open it delicately. It does actually open the mouth, but only for about 1-2 second which is not enough time for me to grasp the moment to put the syringe in. It seems to be good when I put it in front of the window, it's only vocal at that time. The feathers are not done growing yet either.

Oh yeah, on another note, I can't take the cat in. The other person that lives with us doesn't like cats, neither does the landlord (the sister of the other person). She seems to scare it.....

away with sound. The cat didn't mean to hurt it either, it seemed to understand that it shouldn't eat it. I can't really take it to the vet since they cost money, we have no experience of animals yet, vets are not experienced with wild birds, they have different needs, etc etc. If there is a costless place, I'd like to know. (Around 91765) These are just stuff I'm concerned about. I do know more than this, if you think I have a really blank and empty mind. xD

I'll try to take it to a wildlife hospital if I can just find an address..