For easier editing, you can clone existing page/post and simply customize its content.
Using a duplicate plugin
1. Go to Plugins > Install and activate the Duplicate post plugin:
2. Go to the pages/posts list, hover the page/post you'd like to duplicate, and click on the "Clone" link:
3. Now you have the cloned page saved as Draft - click on the "Edit with Elementor" link to customize its content and publish.
Save Elementor Block and Page Templates for re-use
You can follow these instructions: https://docs.elementor.com/article/60-library