how many branched should i work git code example

Example 1: creating a branch in git

git checkout -b <branch_name>

Example 2: commit to a new branch

git checkout -b your-new-branch
git add <files>
git commit -m <message>

First, checkout your new branch. 
Then add all the files you want to commit to staging. 
Lastly, commit all the files you just added. 
You might want to do a git push origin your-new-branch afterward so your changes show up on the remote.