How in drupal 8 programmatically display a form block (in particular, a contact form) and attach ajax to it?

Question

PHP

And then I've been fooling around for a day, but nothing sensible has happened. At least on the semblance of a manual, or where to look))
Ps I read Drupal for only one week)
thanks in advance)))

Answer 1

Help:
1. Display the form in a block
2. Make the form ajax