Hi Valesa,
You write "I followed the instructions (https://h5p.org/moodle) and I was able to see the activity H5P.com,"
There was absolutely no need to do that. The "H5P / Interactive content" plugin is now part of Moodle. I don't know what you did but only "Interactive Content" should appear in the "Add an Activity or Resource" list, not H5P.com.
H5P.com is a repository of H5P contents which allows users not using Moodle (or WP or Drupal etc.) to create, store and use H5P content. You have to pay for it.
If you use Moodle, as you found out, you simply create your H5P contents as you would create any other standard Moodle activity (Lesson, Quiz questions, etc.).
In the "Add an Activity or Resource" list, when you select Interactive content, I think it's misleading that the "More help" points to the H5P website rather than to the Moodle docs at https://docs.moodle.org/38/en/Interactive_Content_-_H5P_activity.
I do agree that all this is not as straightforward as it might be, but I hope you will enjoy using the wide range of H5P activities. Personally I think their strong point is in practising, not testing, so the lack of reporting does not bother me.