driving Rome to L'Aquila to dive in Capodacqua and back

Hi,

I am planning to rent a car on August 19th (Sunday) in the morning then drive to L'Aquila and dive at a site called Capodacqua lake and then driving back. a couple of questions:

1- is it worth it (the dive site) or should I spend the day in Rome (I have a total of 4 nights in Rome)?

2- how is the road like for someone who never drove in Italy?

3- what would be the best place to rent the car from in rome, I am staying by the pantheon?

Thank you in advance