I believe there is a clause that may allow this person to secure an OSAP loan.
https://carleton.ca/awards/osap-eligibi ... finitions/
"Ontario is the last province you have lived in for 12 months in a row without being a full-time post-secondary student or
you live in Ontario now AND have lived in Canada for less than 12 months in a row"
Since OP has not lived in Canada for more then 12 months, he/she will be eligible. However he/she would have to first land in Ontario, get an address, and then apply. So there is not point trying to do anything now as there is no way you can get an OSAP loan without an Ontario address.
If OSAP is not possible, try to look into other loan options, our Federal Interest rate is 0.25%. You can get loans for rates as low as 2.5% as a student here.
May I ask why you didn't decide to move to Canada after applying for immigration? Just wondering cause it's a lot of hurdles to obtain a PR.