When you add a “Visual Link Preview” block you set a URL and it should then try to automatically retrieve the image, title and description for that URL and show that.
If it’s not able to load those details automatically, they can also be set in the sidebar.
I’m afraid the plugin does not have an Elementor block at the moment. The integration requires quite a bit of development and it’s still on the todo list.
Technically it would be possible to create the link in the Classic Editor and then copy the shortcode it generates to use in Elementor. But that’s obviously not ideal.