Can students apply for individual tourist visas in Canada? What should I pay attention to? Is there a good chance of disapproval?

Minors are not allowed to go abroad freely, because there are many guarantees abroad, such as fixed assets, no immigration, no crime, etc., and minors cannot be legally responsible for their actions. If you want to go out, go with your parents, or wait until you grow up. Summer camp or something will not take you to many interesting places, so it is not recommended.