This really sounds like it is something that you are writing for one of your courses. That means that it should be posted or submitted inside Canvas. If it's a discussion, then you probably intended this to go into a discussion for one of your classes. Where it ended up is in a global forum about the Canvas learning management system software (the software your school is using). This online community is for discussing Canvas itself, not for submitting assignments within Canvas. It's a difference that people often find confusing.
The comments you leave here will not be seen by your instructor and if they are for a grade, it will look like you haven't posted to the discussion. You need to make sure that where you are posting your discussions or submissions look like the rest of Canvas with the same navigation menus.