…or create a new repository on the command line
$ echo "# your_project_git" >> README.md
$ git init
$ git add README.md
$ git commit -m "first commit"
$ git branch -M main
$ git remote add origin git@github.com:yourusername/your_project_git.git
$ git push -u origin main
…or push an existing repository from the command line
$ git remote add origin git@github.com:yourusername/your_project_git.git
$ git branch -M main
$ git push -u origin main
NOTE: show current git remote origin
$ git remote show origin