My question involves court procedures for the state of: FL

Found out during process of service (by sheriff) that one defendant passed away a few months prior to the docketing of my complaint. I have been searching for more information but all I have is the date of death and not even where the defendant died so now doing more searching and probably will hire a PI to get additional information. I have looked in the probate court of the county to see about the estate but nothing there as well.

Questions.
1.) In case I do find the executor of the estate, how do I proceed? Do I just amend the complaint and name the Estate of... and then serve the Executor?

2.) In case I can't find any estate that has been setup, how do I proceed? Do I ask the court to setup an estate from which I can sue? If yes, is there a name for this type of action?

Any help would be great.