Use Git & Github to submit your coursework as a pull request. Follow the pull request workflow defined in the repo you are working on. Repos and projects usually have a specific defined way to open your PR so it's important that you read and follow the individual guidelines.
The Github Desktop cheatsheet will help you.
This module will help you submit your coursework.
Contributing to a remote codebase is a necessary skill for a professional developer. Opening PRs is mandatory at CYF. It is part of the coursework.
If you cannot submit your coursework you must post on Slack to get unblocked.