Florida itinerary?

Hi I am making my for a 5-7 day trip to FL from the west coast end of March for spring break. Can I get a good itinerary? I would like to see St. Augustine and a nice beach on the gulf side. I may even do Disney world though I am an adult not traveling with kids. Thanks in advance! P.s. yes I would have a rental car as I would like to explore the highlights of your state