I Have Canadian PR. It Will Expire In September 2018.

I Have Canadian PR.  It Will Expire In September 2018.  Currently I Am Pursuing My Bachelor’s In India And It Will Be Finished In May 2018.  I Want To Study Masters In Canada.  I Feel Regret Of Losing My Pr Status.  Should I Go To Canada On Student Visa Or Pr.  If I Go On PR, After Expiration I Have No Status To Study.  Can Anyone Please Tell Me What To Do?