Elementor theme builder is a great tool for building and modifying WordPress themes. I have used it many times and it has always worked well for me. It is easy to use, but it does take some time to learn how to use it properly. Try this
https://masterbundles.com/best-free-shopify-minimal-themes/ site to download beautiful themes. It is important to understand that the Elementor theme builder only works with WordPress themes. It will not work with other types of websites. If you are looking for something that can be used to build non-WordPress websites, then you may want to consider using another tool instead of Elementor.