Forget about steamvr home, simply lay the headset on the ground, press the pairing button on the HMD marker once (i guess it works as quick calibration button for the floor) and start the game you want from the desktop.
Height calibration via steamvr wont work properly and is not really necessary. If it will not work - try to launch the game first and calibrate floor later, basically thats all you need to do.
In addition to this you can try to use OpenVR-AdvancedSettings app, it allows you to change a lot of steam settings using the interface inside the game/steamvr.
https://github.com/matzman666/OpenVR-AdvancedSettings
means you will be able to adjust height for each game separately
