There are many companies willing to hire entry level candidates for positions in administration for positions like CTA, project assistant, or research assistant. You can also look locally for clinical research coordinator positions.
Florida doesn't have too many contract research organizations, so u may want to consider a move to NC, NJ,TX or CA in order to get your foot in the door.
Another Masters will probably be a waste of your time. Get the entry level experience first and then worry about advancing by getting the masters later on.