Using H5P to build a custom editor for interactive films

I can't find any guidance anywhere online. I'm a Python developer trying to use H5P to build a custom open source editor with a focus on creating and deploying interactive films using H5P open source libraries. I want to host content on a WordPress with H5P plugins as I know that's compatible. I'm just looking for some guidence on what libraries in specific I would have to focus on and how I would go about building out the editor.