Immigration tendency is very serious, how to deal with it?

You don't have any tendency to emigrate in this situation. It is a reasonable arrangement to go to graduate school after graduation.

You should prepare enough income certificates and bank deposit certificates, and your experience in the UK will be helpful to your application.

In addition, when you get a visa, you can also change your major into a two-year diploma, so it is more convenient to apply for experienced immigrants in the future.

Or you can consider a one-year course, then work in Canada for one year and apply for skilled immigration.