Setting Up Facebook Advanced Matching Manually?

Question

Ive tried to setup Advanced matching manually on my Wordpress site. Events manager is telling me to increase coverage for email, first name and last name.

FB events manager says to increase coverage

This is the code ive added to the pixel.

<!-- Facebook Pixel Code -->
<script>
  !function(f,b,e,v,n,t,s)
  {if(f.fbq)return;n=f.fbq=function(){n.callMethod?
  n.callMethod.apply(n,arguments):n.queue.push(arguments)};
  if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
  n.queue=[];t=b.createElement(e);t.async=!0;
  t.src=v;s=b.getElementsByTagName(e)[0];
  s.parentNode.insertBefore(t,s)}(window, document,'script',
  'https://connect.facebook.net/en_US/fbevents.js');
  fbq('init', 'PIXEL-CODE', {
  em: '{user-email}',
  ph: '{user-phone-number}', 
  fn: '{user-first-name}',
  ln: '{user-last-name}',
});
  fbq('track', 'PageView');
</script>
<noscript><img height="1" width="1" style="display:none"
  src="https://www.facebook.com/tr?id=PIXEL-CODE&ev=PageView&noscript=1"
/></noscript>
<!-- End Facebook Pixel Code -->

My question is

1. does the pixel track the email, first name, last name on PageView even when a visitor just views the page or do they need to provide input like in the forms for the pixel to track their data?
2. For the em: '{user-email}' part, do i need to replace {user-email} with the input field name in my form for it to work? Is my code correct?
3. Assuming everything is working and setup correctly, should i see immediate results especially in the email, first name, last name being 100%?

Thanks to those who could help.