Ping coming soon page using jquery html css bootstrap

I really struggled with the form validation using js for this... I usually use HTML to verify email forms but I wanted to use the challenge instruction. Is there a shorter way to validate email input using HTML?

Also I hear over and over how label inside an input field is not accessible so I added an aria-label in the input, but when I tested it with NVDA screenreader it read "your email address" twice which seems to imply that the label inside the input field is fine for screen readers. Does anyone have an answer to this?