I am using a free account here at canvas.instructure.com, yes.
The Blackboard LMS solution I am using at my workplace today, has an easy H5P LTI connect feature when setting up a learning module. That enables me to set up an LTI link to my learning material in my H5P account.
I was told that Canvas would have something similar. Maybe that will happen as soon as we get our institutional version up and running and that external tools have been set up by our admins?
I have enclosed a couple of screenshots of what I am doing and the subsequent error message.
Best regards,
Kjell Are Refsvik
Norway