New to Medicare in Arizona

I need some help, I have Medicare A & B, and wanting to add Medicare Advantage Plan. I have seen alot of info out there and just want to make my job a little more easy. Does anyone have Cigna HealthCare for Seniors, Secure Horizona Medicare Classic plan or Secure Gold, or Humana Health Plac Gold Classic. Plus I have not start using my medicare insurance. All my records stuff is over a few years, where is a gooding starting point. Thanks