From here, add some information about your model:

Select the owner of the repository. This can be yourself or any of the organizations you belong to.
Pick a name for your model, which will also be the repository name.
Choose whether your model is public or private.
Specify the license usage for your model.

Now click on the Files tab and click on the Add file button to upload a new file to your repository. Then drag-and-drop a file to upload and add a commit message.