Insert Website URL without adding http or https

When a visitor enters a URL on the form on the front-end of the site, they can’t submit the form unless there is an “http://” OR “https://” in the field.

Second question, I would like to collect email addresses from this slide in, but I need to get notified when a new email address is submitted via this slide-in.

Is there a way to do this, similar to the way Forminator sends an email after a form submission?