In the future, in5 might be able to do all this packaging, scoring and metadata, but for now, it will be a manual add.
Here are the steps in more detail.
2) Before zipping the files together, you need an imsmanifest.xml file that points to your index.html file for the LMS to load up.
3) Zip all the files together as a package (index.html, imsmanifest.xml, and the assets folder).
You will almost certainly want the help of an experienced developer (this is not a task for a non-coding designer).
If you haven't done it before, you might want to hire a contractor to help.
Here are additional details on the process: