If you are new to this like me use a boilerplate plugin as a starting point:
https://github.com/DevinVinson/WordPress-Plugin-Boilerplate
Then simply compress it (as a Zip file) and install it onto your website.
Make sure you have some FTP software to access your websites files when you inevitably mess up and crash your website and need to delete your broken plugin to make your website function again (I recommend Cyberduck).
