If your TV does not support HGIG (and the “suns” both disappear at the same time on the HDR setting screen) he has a table with the number of clicks needed to properly calibrate your display. Just look up your display’s peak HDR brightness and use the table.
If you can’t find your display’s peak HDR brightness for some reason, use the values for 1000 nits.
Yes, the paper white should be about 200. But the TML should be around 1000 (assuming your TV’s max TML is 1000)