Im truly sorry i came late with this. But i didnt know that people didnt know how to do this...
First press on Tutorials button and click on Submit a Tutorial!
Then you get to see this screen.
You have to fill it all in(about ur toturial) and check "I agree to the folowing Terms and Conditions".
This is where u start making totorials.
Add text to your drawings. Click on Browse and find the picture you want to upload then press on Upload.
You need atleast 3 steps to make it a tutorial.
And then you Can Save the tutorial to the site and hope it will make it ^^
Hope this will make it also hehe