Well you’ll need a form provider like tinyletter and embed the form.
Got a 403 when trying to post the detailed reply:
A potentially unsafe operation has been detected in your request to this site.
Generated by Wordfence at Wed, 5 Feb 2020 13:01:52 GMT.
Thanks, I see, so the QF theme doesn’t really provide a form, it just provides the possibility for you to include it within its settings, so to speak. I guess I’ll follow these instructions then: