Doing A-level aboard

My name is Ayshnan Banutheepan and I'm from the UK, I am looking for a Canadian high school near Scarborough, where my uncle and aunt live, I'm joining sixth form this would be grade 11 and grade 12 in September 2024 and I have to apply around September or December this year If you can recommend any good high schools that do Canadian and Worldwide studies, Computer Science, Maths and Graphics that will be fine and I message your support team and they were unable to find any schools if you wouldn't mind finding me any schools or any subjects.