to pull project from github to your local machine :
1-create a repo on github
2-open the repo and go to repo code , click on the green button "Code"
3-copy the link "SSH" or "HTTPS"
4-go to your command line app on your machine
5-run this command : git clone (Link from step 3)
6-press Enter and you will have your project locally
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if you alrady did that and you just want to pull the changes from your github
just open your command line app and go to the project path or directory
then : git pull origin main || git pull origin " any branch Name"
this will pull all changes that you don't have them locally

git checkout new_feature
git pull <remote repo>