You don't need to create a shortcut in the shortcuts app to create a simple text note. Just say "Hey Siri, create a 'note title' note in evernote." Then to write text into that note say "Hey Siri, Add 'text of note' to my 'note title' note."
You may find this article to be useful. It uses siri integration into evernote instead of the iOS Shortcuts app. https://help.evernote.com/hc/en-us/articles/115012563688-How-to-use-Siri-with-Evernote