I recommend hiring a local attorney, and see if you can get the charges dismissed.

What are the next steps if I plead not guilty to my disorderly persons offense?

This is only your first court appearance. I would plead not guilty and request time to hire an attorney.

Can i drop my felony class c to a misdemeanor , its being over two years, and I haven't gotten another ticket or anything,HELP

It is important to find out exactly what you pled guilty to, this way you can understand your expungement options.

Can my juvenile criminial record effect my job now that I am 47

It depends whether you were fingerprinted. I suggest an expungement.

What are my consequences for association shoplifting?

It is imperative that you hire a lawyer, because it sounds as if your matter can be dismissed with resolution of your co-defendant.

I currently am using my CD defense in NJ; I was arrested in Miami for disorderly conduct on MDW. Do I need to tell my PO?

I of course agree with the comments above. If it is a condition to remain arrest free, which it usually is, then you need to tell your probation...