Email automations not sending?

Site URL: https://www.jotterbookflowers.com

I subscribed to Squarespace email campaigns, then proceeded to: 

- Set up 3x automations 

- Complete sender details 

- Ensured I had my legal address included 

Then I added 40 or so email subscribers manually, to the email list that my automations are set to send to. 

However none of my automations are sending, and I haven't received any test emails in spite of trying to send one to myself multiple times! I've read all the help articles but can't see where I've made an error. Does anyone have words of wisdom here? I've emailed Squarespace help too but no response in a week. Thanks so much!