Accessibility: how to add labels to Newsletter block form fields

Site URL: https://cathrynworrell.com

I'm using the Brine template and I've been trying to fix lots of accessibility issues on my site. I've have found (thanks to the SS forum) code to deal with most of it but how can I add form field labels to the newsletter block? I think I may also need alt text for the RECAPTCHA part of the block too.

Is it possible to fix this?

Thanks.

I ended up getting some external tech support for this as I wasn't able to make it work without the extra help, although the issue with the Recaptcha still remains.