I want to share my experience and put some perspective on the process from G1 to full G.
i landed in Canada last year as a PR. As I was not settling permanently I did not want to initiate the license exchange process. I drove with my home country license without any issue during the month I spent in Ontario. I rented a car, also rented a U-haul all without any difficulty with my home license. I came back to Canada this July 1st and after my quarantine I went to take the G1 test on July 15. I had prepared also a DL extract so that I will be able to book the G road test and pass it immediately. I successfully passed the knowledge test and pay for road test fees. Then the real issue started when searching a spot for the G test. I am based in Ottawa, and the earliest date I got was in March 2022. I started looking outside Ottawa and even the earliest I found was a spot in Dec. As I needed absolutely to pass the road test before Sept, the following days I kept looking almost every 2-3 hours in the system in all towns in Ontario (some people cancel their road tests, freeing some spots). I was lucky to finally get a spot for July 30 in Kingston. even though it was for G2 road test, I had already made my mind to book the earliest available be it G2 or G. That day, I travelled a round trip with a friend to Kingston where I passed my G2.
Now with some hindsight, I will like to say it was the best decision to take the G2 instead of G:
1) I made some mistakes (eg. uphill parallel parking with the wrong positioning of the steering wheel) which would have failed me on the G test. I feel that instructors are more accommodating on the G2,
2) if you fail the G, you have to start back from the G2, so better take the G2 at 1st place,
3) You got the same advantages as for when and where you can drive. The only difference being the Zero-tolerance alcohol level for G2 (not a big deal for me). Also the possible gain in insurance premium from G was offset after discussing with my insurance broker who states that as I do not have a driving experience history in Ontario, it will not make a real difference.
I intend to pass my G before the end of the year (I have started again to search the next available spot ) as it still makes a difference (some jobs require a full G license) but for now the G2 is more than enough.