Some of those categories require eligible Canadian work experience. If you want to work in Canada after you graduate from your studies, you must apply for a work permit under the Post-Graduation Work Permit Program.
Note: Completing an Express Entry profile is the first step to immigrate to Canada permanently as a skilled worker. Completing an Express Entry profile does not guarantee that you will receive an Invitation to Apply for permanent residence. An Invitation to Apply for permanent residence will be based on your score and rank in the Express Entry pool using the Comprehensive Ranking System.