studnet visa rejected once

[jasleen_1989]

hello everyone my student visa has been rejected once due to the reasons that
i could not demonstrate enough funds to stay in canada for one year  without working there
secondly they said that my previous qualifications do not match my course selection

i am a final yr bsc nursing student and i have almost one and a half r free ahead so i want to utilize it in doing business administration so that i can come bak and use our plot in making a nursing home of my own so as i had nt attached any cover letter and very less bank documents will it be helpful if i attach major documents and attach a cover letter