Multi Step Forms - Possible??

Hey, this worked for me, thanks!
I’m kind of a developer, but not really. (lol) So I’m wondering, how much do I have to worry about the data array index changing in the future? I know it’s out of our control and Hubspot isn’t going to send out a user-wide email, but if this custom code ever stops working, it might be difficult to catch.
Also, if someone quits halfway through the forms, I know we can send them a reminder email to come back and fill it out using the HS automations, but is there a way to send them to the exact step on the original page? Otherwise, the workaround is to create individual pages corresponding to individual steps. Then updating the embed code to only include the forms from that point forward.

Thank you!