This doc guides you through getting the process of enabling and creating Nintex Forms.
Nintex Forms for SharePoint
These are applicable to both Nintex Forms 2013 and Nintex Forms 2010.
Looking for examples of Nintex Forms? These templates and examples are from the Community!
A few additional tips
Want to know what Browsers Nintex Forms support?
Nintex Forms for Office 365
Nintex Learning Center
New to Nintex and looking for additional resources for learning how to use Nintex products, or want to brush up on some features? Head to the Nintex Learning Center to find more training resources, and allow you to earn Nintex certifications.