Try having SteamVR running before you launch the gAme?
Ah, I was launching from the itch app. Once I launched directly from the .exe I was fine. Looks like the itch app launches into non-VR mode perhaps, as I it was going straight into the aircar, instead of the initial "standing/seated etc menu. Just need to recenter VR now (Im above the aircar), but I will start digging around for keybinds. Thanks for advice. Cheers.