You have to search for the colleges in Ontario offering your desired course. After the successful completion of your course you will definately get work permit. In addition, a work permit is usually granted after 6 months
And in my opinion, you have greater chances to get a student visa because you have the experience and knowledge which will be very useful in classroom. I know a person got visa in the age of 49, Currently he is studying in Concordia university. Go ahead
You will 100% get your student visa. There is no discrimination on the basis of age, gender, ethnicity or religion. Canadians respect all and give equality to all. If you have enthusiasm you will get the visa. Apply soon!!!!
Yours submitted documents will determine your eligibility for visa. SOP is not required by Visa Offices and it will never have an effect on your study visas application