Just want to advise you to not do immigration errors because they negatively affect your future applications, you can't apply for SP from inside Canada, you must leave before visitor status expires and apply from outside, if you have any doubt on this you can confirm it with a lawyer they will tell you the same, if the prerequisite course is less than 6 months you can legally complete it on visitor status as long as you have the funds to support yourself and for any costs. Must leave before visitor status expires. Filing for extension of visitor status not recommended. Unless you have a lot of funds to justify how you're supporting yourself without working.