UAE Licences need a letter from RTA (Driving experience letter) which can be downloaded from the Dubai Police app. With that document, you can easily apply for the G1 License at Drivetest.ca (pass a MCQ test of 20 questions). The license takes 10 days to arrive to your postal address. Once you pass the test, you immediately get a document which allows you to set up a G test appointment straightaway (provided they have appointments).
The above GN article implies that you do not need an international license anymore. The international DL was anyway a redundant document which is simply a translated booklet and not an actual license. the UAE DL is in English and Arabic and most countries recognize it as valid proof while renting a vehicle or otherwise.
P.S.: You can drive for 3 months on your UAE license when you first arrive.
As an immigrant who landed from Dubai to Ontario last year, I can confirm that the information shared by me is from my own experience.
The certificate does not need to be attested, as it already states how to check the authenticity on the RTA Website, which implies that there is no need for attestation.
Guys, pls how can i get the driving experience certificate for Abu Dhabi? I am outside UAE and my residency canceled. Driving license is still valid. I intend to swap it for Alberta's. Appreciate your comments. Thanks