My question involves criminal law for the state of: New Mexico

So, I've read other posts on here about people shoplifting from WM, and I unfortunatley have joined them. I am not here to defend myself as I am aware that what I have done was wrong, I just have questions and need answers. Now, I had probably about $50 worth of merch. although I'm not sure of the actual amount. I was stopped at the front doors and taken to the holding room place, and in any case the cops were called. Now, I had given the WM employees an incorrect ssn#, and an incorrect address as well. When the officer came, he had my correct info. So now I have this little slip of paper with a number on it that I'm supposed to call, so that I can get a court date and such. When the time comes, what am I to do? What do I plea? What's the worst that could happen? What's the best that can happen? Will this be on my record forever? I have never gotten in trouble before EVER and so I'm not sure how this kind of stuff works. Please help!