After creating and adding the SSH and GPG key to your github account; you amy want to test that it works as expected
Firstly you need to create a new repository, and you clone it using ssh and not https
The url will look like this "[email protected]:/<repository_name>.git"
after creating the repository, copy the ssh url and you open your terminal;
use this command to clone the repos to your local machine
git clone [email protected]:<username>/<repository_name>.git
After cloning you do the changes you want to do, using git commands then you commit
When commiting use the command;
git commit -s -m "commit message"
if you included a passphrase will you be prompted for it except otherwise
then you push and go on the gui and check
