Hi @Martin_Guardado , sorry for the delay in getting back to you.
The way you setup a campaign is by adding a “Web Form Submitted” task.
Fill in the field details you wish to capture, in this case we are using IPStack to query their IP address and location so there are a bunch of hidden fields but these can be anything you wish to capture. Plus a hidden checkbox field to protect against spam bots.
The subscriber is then taken to our locally hosted thank you page.
You can see the local page code (deleted link). Just view source on the page to see the mechanics.
Hope this helps, we host all our forms locally with local thank you pages to help our Google Analytics stats on completed forms.