Editable Form Plugin

Hello everybody,
I’m relatively new to wordpress programming. I’m trying to add some structure to some of the pages in wordpress. Came across plugins like Formidable Forms, Form Maker, etc, but what I could see is that those plugins allow creation of a form and let user to submit the form. Next time when the page is visited the form gets reset.
Instead I need an ability for the submitted data to be reloaded with the page. I will have multiple pages using the same form template, and every page should hold its own unique data.

The form will look like this:
-) ValueA1
-) ValueA2
-) ValueA3
-) Section B (can be multiple, user editable)
-) ValueB1
-) ValueB2
-) ValueB3
-) Section C (can be multiple, user editable)
-) ValueC1
-) ValueC2
-) ValueC3

Would appreciate any comments on how to achieve this. Would like to use popular plugins as much as possible.

Thanks,
Ruben

P.S. It would be best if the data is stored inside the page. I might need to have that requirement since I’m planning to read the contents of the form using WP REST API v2.