I don’t see any asset types

Asset types must be associated with a repository and you must have at least the contributor role on the repository in order for you to use them to create an asset.

Asset types can be created by anyone who has a content administrator role. After the asset type is created, it must be associated with a repository for it to be used to create an asset. If you expect to see an asset type but don’t see it in the list when you try to add a digital asset or create a content item, contact your content administrator.