Amalfi is great, and I’ve never had any issue flying there. But, I have an Italian license (and dutch, and swiss, and german, and french, etc), and there is a process to get yourself registered and get your aircraft registered (if you like frustration). With a small one like a Mavic, I wouldn’t bother much with it, but just for the record, and since you asked the question, you ideally need to:
Register with ENAC (rules are here: https://www.enac.gov.it/la-normativa/normativa-enac/circolari/serie-atm/circolare-atm-09)
Register with D-Flight (https://www.d-flight.it/new_portal/en/servizi-d-flight/#Registration-for-PA/)
Set up your online account - steps are here : https://www.d-flight.it/web-app/
Associate your drone.
Buy ‘d-coins’ https://www.d-flight.it/store/index.php?route=common/home and activate your QR code, then either print it or buy a print for your drone and controller. €6
Activate your drone with d-flight
Become an SAPR Operator
Import certificate of compliance and harmlessness. (it’s a real thing)
… but wait, there’s more! You will need to download the maps and register your flight beforehand if the airspace is controlled or if your are a “Pro” operator - which costs more and gives you additional flying possibilities.
but I wouldn’t worry with all this. Lots of small drone operators fly with no problem, as long as your are safe, and don’t annoy people or fly over their heads, etc etc, you’re probably fine.