To study in Quebec, you first need to have a letter of acceptance from the designated learning institution that you plan to attend in Quebec. In addition, you must have received an attestation of issuance of your Quebec Acceptance Certificate (CAQ), which is issued by the province of Quebec. At that time, you can apply for a study permit from Immigration, Refugees and Citizenship Canada.
For more information, contact the school where you want to study or the Government of Quebec.