I currently have a pop-up on my website that invites people to subscribe, but it only asks for their email. How can I include a line to ask for their name? I'm not a developer and I can't do code. Squarespace Support suggested I ask this community for help, but I'd need someone to write that code and then tell me how to enter it. Not sure if this is too much to ask, but would be very grateful for any help or advice, thank you.