You can find the fork buttom in the top right corner.
$ git clone https://github.com/YourUserName/attendanceApp.git
# This will change directory to a folder attendanceApp
$ cd attendanceApp
$ git remote -v
$ git remote add upstream https://github.com/akilvishnum/attendanceApp.git
#Create branch named "yourBranchName"
git checkout -b yourBranchName
#Move to branch "yourBranchName"
git checkout yourBranchName
git add .
git commit -m "Relevant Message"
git push -u origin yourBranchName
Run this to reflect any changes done in the main in your local repo
git fetch --all --prune
git checkout main
git reset --hard upstream/main
git push origin main