Open your repository on GitHub
Click the branch dropdown near the top-left, usually showing the current branch name
Type the new branch name
Select the option to create a new branch from the current branch
Press Enter or click the create branch option
Switch to the new branch if needed
Use Git locally if preferred:
Open your terminal in the repository
Run `git checkout -b branch-name`
Push the branch to GitHub with `git push -u origin branch-name`