First and foremost check with your insurance company. They may not like this, and may deny coverage for a vacant home.
Additionally you will want to visit the property every few days. A popular thing for thieves to do is steal appliances in vacant homes. This, primarily, happens with new construction but could also happen in your case. You also don't want squatters to move in, which has become a problem in several jurisdictions.
Keep in mind this property transaction will be public record, so you want to show some kind of activity at this property.
This is a good time to do any home improvements. Not living in a home makes it convenient to install things like ceramic tile which cannot be walked on after it is laid. Also you will not have to move any furniture to do any other kinds of flooring or painting.
This is all assuming that you are able to make the mortgage payment on this place, and the payment on whatever place you are living now.
Edits based on comments:
You should have water and power turned on. Have the AC set somewhat high, but enough to keep the humidity at bay.
Power outages tend to be short term, and rarely lead to mold. During Charlie, I lost power for 10 days, in August, and had no mold issues.
Pipes bursting are not really an issue in most of Florida. (Perhaps some places in the pan handle).
If this was new construction, it may be advisable to install blinds/curtains as without it is easy to see into the house and that it is vacant. If not new construction, check with the sellers on what will be taken with them.
Most of Florida is not kind to squatters, so you have that going for you.