Multi-step Lead Magnet Pop-up Journey - Ways to accomplish?

Hi,

We're looking to model our lead magnet after www.thewoobles.com. They use Klayviyo, which Squarespace doesn't integegrate with. Our website is www.blatepapes.com

What we really llke is that the pop up first asks the user a question, the user clicks yes or no, then it brings them to the next step which is inputting an email, then offers an SMS input, then it finally shows an "add your free product to your cart!" button.

We want to get as close to this as possible. We have the authjinmg lightbox plugin with the promo add on, but the problem is that we can't get it to be able to access multiple pages in the same lightbox. Once you click a button the whole website refreshes, instead of just revealing the next page within the lightbox.

So, we thought maybe we just use the squarespace marketing pop up, but it doesn't look nearly as good. Additionally, we cannot get the newsletter Post Submit HTML to initiate a lightbox automatically once the email is put in, which is what we'd need to do to call the free product lightbox with an add to cart button.

So my question is either:

1. Does anyone know how we can get the lightbox plugin to perform multi-step journeys?

OR

2. Does anyone know how we can get the lightbox plugin to automatically initiate upon submitting an email address into the newsletter sign up form? (via the post-submit html code) 

Does anyone have a good way of opening a URL automatically with the post submit html code.. without using "window.location.replace," "window.location.assign" or "<meta http equiv..."?

I think the good way is try contacting Lightbox Plugin Author, to see if this is possible or not