Let's break it down.
1- I noticed that to run the angle, usually the node is used for backend apps for example. I saw that you can create layouts with angular, so how do I execute a project through chrome? (for ex exporting the project to a server without node)
You need a web server to publish the application. The angular application could be hosted on an Apache server itself.
As for using the node in the backend, it is not a must, in my previous company we used angular and C # in the backend, it is an issue that depends on the company's need and choice of the company language, the angled frontend has nothing to do with the language chosen for the backend.
2-Using the angular and node, would PHP no longer need a project?
Yes, if you use the node in the backend PHP is not necessary, but if you prefer you can create a project with PHP in the backend and angular in the frontend, you just have an API. The same is for you to use C #, Java, Python, Ruby, etc.
3- With these 3 languages, considering that I am medium in javascript,
where should I start?
Learn javascript first and then study the framework, be it angular, react or any other.
After learning javascript well, create a focus for you, if you prefer to work with frontend, start studying the angle, if you like the backend, study node.
