Instead of reading tutorials, try creating an actual page that you can reference.
I have just spent the last 10 minutes in creating a Free Web Host, used FTP (FileZilla) to upload a very basic RWD index.php page.
The index.php page contains a link to the Google Mobile Friendly Test
On the off-chance your have any problems it will be far easier to solve with an actual example.
Edit:
Moved link for “Google Mobile Friendly Test” to my site to prevent popups.