If a person has a dream then by all means they should follow that dream but the reality would be finding a college first to provide an offer given she did not complete post secondary and then there are the fees where proof of funding at least for first year is required, approximately 18000 CDN course fee and 10000 CDN living.
After that in applying for a study permit the course has to be relevant both to current qualifications, previous work experience and future prospects on returning to home country.
Before going through all above maybe the cousin needs to visit first to get a reality check although even getting a visit visa has many conditions that need to be met.
As said if someone is really determined enough anything is possible and nobody here can predict anything but will not be an easy path , rejection may be the only outcome.