Free support is not limited to 15 days, we offer free support here in the forums for any questions you have with our software for as long as you use it.
the 15 day period is a refund period. you can request a refund at any time with in the 15 days.
as for tutorials, it all depends on what you are trying to accomplish.
You can find all our tutorials on this page:
I suggest using the Getting Started Guides for each of the products to get your feet wert, then progress into the other tutorials.
You may find the web dev workflow tutorial helpful: