in your cPanel, public_html files - your installation location (domain) (subfolder, if any)
in system/ config
// Admin Section Configuration. You can change this value to any name. Will use ?s=name to access the admin
define('ADMIN_PATH', 'clean1215'); where clean1215 is whatever you set your admin_path during your installation.
Since you are just starting - why don't you delete this installation and re- install after reading a bit more in the manual.
Or if you cPanel has Softaculous use it to install AbanteCart - and most of your issue should be resolved.