There's more to journalism school than that. But I let you cook.
There may be more to journalism school, but there is not more to journalism.
You cite your work, cite the support for your statements, you craft a narrative of , ideally honest, the events as they occured.
Thats journalism, that is how you document history.
If you investigate you do the same thing.
If you can do that, you are a journalist. Going to school for journalism is like going to school for any form of art, it is entirely non-essential.