I want to understand how I can use AEM forms (6.1 without any additional license. )
My aim is to create a form in AEM and on submission pre-process the data before submitting it to the external system.
Can some one please point to right tutorial(s) for AEM forms ?
You can use use OOTB submit actions or write a custom submit action to process submitted forms data before writing to an external storage. See if the following docs help.
I have asked internal AEM forms team to help you with this.
And I am moving this post to AEM Forms, as there you will get better AEM forms related expert to answer your question.