My question involves criminal law for the state of: california
Yesterday I caught shoplifting at Kohls. The items totaled around $60-$70. I am 18 years old with no priors. The police came and I was given a ticket for a petty theft misdemeanor 484a. I have a court date on 4/13/09. I have several questions regarding what is to happen now.

Is it necessary to have some type of attorney? I cannot afford a private one.

In terms of attaining a public defender, can I go to the court or to one of their offices to get one ASAP?

If is better to plead guillty or not guilty? I am willing to pay all the fines and do whatever community service and/or diversion programs to also keep this off my record. But I would like to be done with this whole situation as quickly as possible.

I'm not sure what can be done until my court date, if there is anything to do at all.
If I write a letter of apology to Kohls would that look better to the judge at all?

I have certainly learned my lessons and I am extremely remorseful. I am grateful for any replies that you may have.
Thank you sincerely.