OneDrive Drive and DriveItem

[Luca (LuchiLucs)]

I'm new to the msgraph-sdk-python library. After logging in with a corporate user to provision OneDrive, I am able to see a page of my corporate that I believe is OneDrive for Business but the url and the page seems like a sharepoint library. The url format is:
corporatename-my.sharepoint.com/my under "My Files" tab.
I tried creating a folder named "test".

Now I wish to use the SDK, for instance, to do the following tasks:
to see the folder, create a new folder, list files, upload/download a file, and convert a .docx into a .pdf

My attempt so far is something like this:

class OneDriveDAO:
    def __init__(self):
        self.client = GraphClientSingleton.get_client()
        self.user_id: str = myuser_id
        self.drive_id: str = mydrive_id

    # GET /users/{user-id}/drives
    async def list_drives(self, user_id: Optional[str] = None):
        if user_id is None:
            user_id = self.user_id
        drives = await self.client.users.by_user_id(user_id).drives.get()
        if drives and drives.value:
            for idx, drive in enumerate(drives.value):
                print(f"{idx}: id={drive.id}, type={drive.drive_type}, name={drive.name}, description={drive.description}, url={drive.web_url}")
        return drives.value

and I am able to properly see two Drives object, one is named "OneDrive", the other is named "PersonalCacheLibrary".
I selected the id of the "OneDrive" Drive, and now I am trying to list or create a new folder without success.

My tries:

item_path = "/root:/test/"
await drive_dao.client.users.by_user_id(drive_dao.user_id).drives.by_drive_id(drive_dao.drive_id).items.by_drive_item_id(item_path)

The problem is that when I get the drive by its id, the returned object have the root, items, and other attributes set to None, and I am not able to chain the desired methods.
I don't know what to try