Can Someone Please Explain How To Use the New Git Buttons?

 
I've never used anything related to git or github before because I usually do solo stuff but I would like to learn although I don't want to mess anything up and accident lose days of work. Can anyone please explain how to do it because I tried to follow the steps in the old 2024 article but its for windows 10 and I'm on a windows 11 pc even though I didn't ask for it to update (thanks bill gates). 
 
You might have to try git first then GitHub