Diploma

Hello Rijesha, of course you can pursue your B. Arch from Canada. The basic criteria is good academic standing if you want to get into a good university. Taking SAT is not mandatory but a few universities might require. As an international student you must also take IELTS or TOEFL. A little research by visiting university websites and the department page will help. McGill, University of Toronto, University of British Columbia, University of Western Ontario, University of Waterloo are some of Canada's famous universities.
Regards

Yes you can pursue B.E. or B.tech in Aeronautical Engineering after completing diploma in mechanical engineering and you can get admission through lateral entry programs in colleges which offer this course. Aeronautical Engg is somehow related to mechanical Engg and it's is also a good option to look as a career.

Hello dear, u may take help from the shiksha portal list. Try to get some good college. All the best. Thank you.

Hi,
You will get admitted through Lateral entry to 2nd year. So you will have only 2 years to study.

You have to first go for degree in BHM