While trying to push the downloaded code to populate your recently created CodeCommit repository i got this error:fatal: unable to access 'https://git-codecommit.us-east-1.amazonaws.com/v1/repos/theme-park-frontend/': The requested URL returned error: 403
i have not tried anything.
If you "have not tried anything" yet to solve the issue, immediately going to Stackoverflow and asking others to solve the problem for you is maybe not the right thing to do ;) Best check this article for any future questions you post here.
Anyway, the error message in your screenshot indicates that the git credentials haven't been set up correctly yet. Did you follow the instructions from the workshop, specifically the git config commands outlined here?