1) "main" refers to the main "branch" within a repo, not to any particular repo. Your local repo would have a "main" branch, and so would the remote team repo up on GitHub, and so would your remote fork of the team repo.
2) to check WHICH remote repo your local is connected to, try:
git remote -v
If that URL points to your personal fork
https://github.com/Fkhan684/CurlewRepo.git
Then you should run these two commands, to change it so that you are connecting to push/pull to/from the team's repo, instead of to your fork.
git remote remove origin
git remote add origin https://github.com/AugustanaCSC305Fall22/CurlewRepo.git
Hope that helps!