First time offense - Violation of code 647(f) -do I need legal representation?

[flores_78]

I was arrested for violating CA penal code section 647(f) and spent 9 hours
at the jail at the West Hollywood Sheriff\'s Station. I need to appear at
LASC West Beverly Hills Courthouse on Tuesday, December 30th. The offense
occured on Halloween night in West Hollywood, there was a lot of people
around (mostly in costume) and I lost track of where my friends were at.
The cop that arrested me was fairly vulgar and from what I remembered was on
a power trip. I have no prior offenses (clean record) as well as a clean
driving record. My friends and I arrived via taxi so I had no intentions of
driving home that night. Do I need an attorney to get a copy of the police
report? Do I need legal representation? I am on an extremely tight budget
right now so not having that extra expense will be beneficial if possible.
What are the chances that I can get my record expunged? Again, other than
this offense I have a clean record.