The UAE is unfortunately very unorganised when it comes to drones, each of the 7 emirates have their own requirements when it comes to registration and certification. In theory you'll need both a country registration as well as a registration for each individual emirate where you want to fly. I live in Dubai and have registered my drone with the Dubai Civil Aviation Authority through their website:
Dubai Civil Aviation Authority was established as an autonomous body by the decree issued by His Highness Sheikh Mohammed Bin Rashid Al Maktoum, Vice President and Prime Minister of the UAE and Ruler of Dubai, by proclamation of Law No. (21) of 2007, to undertake development of air transport...
www.dcaa.gov.ae
As a resident you are also required to go through a mandatory pilot training through one of the DCAA approved training suppliers before being given your pilot's license.
Note that even as a tourist you are supposed to pre-register your drone before arrival in Dubai or you risk having it impounded when entering the country.
For the country registration check the GCAA website
https://www.gcaa.gov.ae/en/Pages/Default.aspx, I admit to never having done this however
Lastly, the no-fly zones are very broad in the UAE so technically you'll be violating the rules pretty much everywhere :-(
The GCAA has a flight zone map on their website, the DCAA has an app for the same.
