Puedes ver el temario objetivo del examen en las páginas de EX200:
Por si te sirve de referencia, también puedes consultar el temario visto en los cursos RH124, y RH134.
Así, recordar que toda la documentacion de producto está disponible de forma gratuita en https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9
I recommend you to contact firstname.lastname@example.org and they can help you with how to get onboarded for a training.
They will let you know about course documents which you need to follow for the same.
AFAIK, You wont find any course specific for RHCSA on any platform other than Red Hat learning portals.
Please refer the same here : https://www.redhat.com/en/services/certification/rhcsa#:~:text=An%20IT%20professional%20who%20has,RH....
I would personally not use any of the courses on Udemy. I have the highest rated one for the RHCSA and it's not good.
I would recommend oreilly.com. Get a subscription from them, they have all the info you need to pass the RHCSA and many other exams. Check out the material from Sander Van Vugt on O'Reilly.
I would like to have a Red Hat Learning Subscription but unfortunately I can't swing it
Here are my study notes for the RHCSA 9, maybe it will help. I'm taking my RHCSA exam in May so I'm still updating them.