Yes - it may have an impact. To be approved for a visitor visa, you must be able to prove that you have strong ties to your home country and have no plans on remaining in Canada long term. If you have been refused for a work permit and are now attempting to come to Canada using a visitor visa, CIC may think you are trying to find a way of staying in Canada long term.
Are you going to say that you reason for visiting Canada is to study English? If so, that's likely going to look like a pretty weak explanation (why spend so much money to come to Canada to study English when you can easily do it elsewhere for far less money?) - and will likely make CIC suspect even more that you are trying to find a way to stay in Canada long term.
If you want to come as a student then I would recommend that you enroll in a real diploma / degree that makes sense in light of your past education and experience and come here on a proper student visa.
