Twenty Twenty child theme help

I’m trying to create a child theme for my twenty twenty theme website. I am relatively new to wordpress and my technical knowledge is basic at best.

I have created a child theme folder in wp-content. I have added a style.css sheet to it with the following code inside: Theme Name: My Twenty Twenty Child Theme
Theme URI: https://example.com
Description: A child theme for Twenty Twenty.
Author: Your Name
Author URI: https://example.com/
Template: twentytwenty
Version: 1.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
*/

I have activated this child theme on my dashboard. But the site it brings up is a total mess – most of the fonts are not the ones on my main site, formatting is off etc. I’m baffled as to what the point of a child theme is if it creates a rubbish version of my site. I thought the point was to prevent updates messing the site up? But if this child theme version of the site is what I get it still needs to be redone so I don’t really get the point.

Also do I need to enqueue? I don’t have a clue what this means or does. And even less of an idea how to do it even after looking at several instruction posts! Apologies for my ignorance on this and thank you in advance.

The page I need help with: [log in to see the link]