The problem is the version of Evernote I tried is not AppleScript scriptable.
When trying to add Evernote to the Library in Script Editor, in order to review its AppleScript dictionary, it errs with: Add Item Unable to add the item because it is not scriptable.
Additionally, when running the following command in Script Editor:
tell application "System Events" to ¬ get has scripting terminology of application process "Evernote"
Its result is: false
Apparently at one time Evernote was AppleScript scriptable, however, in macOS Catalina, testing with Evernote from https://evernote.com/download/ and checking Evernote > About Evernote it shows:
© 2019 – 2021 Evernote Corporation. All rights reserved
Looking for the typical AppleScript dictionary in
/Applications/Evernote.app/Contents/Resources/ there is no Evernote.sdef files as would be expected if it was fully AppleScript scriptable.
If you do have a version of Evernote that is AppleScript scriptable then try the following, which I cannot test under the circumstances:
set myNote to create note1 with text myTitle title myTitle notebook "Imported Notes" tags ("imported_from_notes")
You might also want to put in some parentheses. e.g.
set myNote to (create note with text myTitle title myTitle notebook "Imported Notes" tags ("imported_from_notes"))
Unfortunately without a version of Evernote that is AppleScript scriptable, I cannot offer more.