Hi Liliana,
You can install Elementor on your site alongside another page builder as long as you just don’t edit each other’s content. Using Elementor along with other page builders might result in a plugin conflict or it might create some unwanted changes to the page content.
Please note that with Elementor you’ll be able to create and edit new pages, but it will not allow you to edit existing pages that were not built with Elementor.
I hope this answers your questions, thank you!
