pizazz

This is the page: http://tilleysong.com/ Not sure which version, where would I find out that info? I looked through all the Settings section and couldn't see mention of a version

Hi folks, I run my mailing list through ActiveCampaign. I have a one-page "cover page" site with Squarespace. I want to put a simple signup to my mailing list on my page, but can't figure out how to do it. Is it possible? I can't find anything helpful in existing forum discussions or in the Help Center. I'm getting the impression that we can't add HTML blocks to "cover pages" on Squarespace, would that be correct? There is a "newsletter signup" under "Action", but it only shows Squarespace, Google Forms, or Mailchimp as options. I'm guessing this just straight up isn't an option, but if someone could tell me either way, I'd be grateful. Thankyou.