To add some H5P content to your your courses, visit the course's dashboard, either logged in as administrator or instructor, and click on the Add content (1) option to add new content to your course. Select the option Add unit (2) to add a new unit, which is going to be an H5P unit.
Once you do so, you will get to the Add unit page. Provide a name for your unit and the under source select the option H5P Editor (3). You shall notice that the content editor has been replaced by a dropdown menu where you can choose among all available H5P content types (4). Select the content type you want to work with and start building your content.
After selecting the type of content you want to add, you will be presented with the corresponding template (5). Some content types offer a direct link to the tutorial on H5P website (6).