Change "Newsletter Form" title

Site URL: https://drinkyourregion.com/

The newsletter form has a title.

"Newsletter Form" . I want to change this copy.  how do I do it?
https://gyazo.com/543be04689dd023135097dbe167dfd1f

Add to Page Settings > Advanced > Header

<style>
  .form-title {
    visibility: hidden;
}
  .form-title:before {
    visibility: visible;
    content: "Tuan";
    font-size: 20px;
}
</style>

What can I put into this code to also add a paragraph space and change the font here?

I want 'where shall I send it?' to be on a separate line with a space in between

thank you

2 hours ago, Livine said:

What can I put into this code to also add a paragraph space and change the font here?

I want 'where shall I send it?' to be on a separate line with a space in between

thank you

 

Hi. Where is it?