When I first started VR I would get sick, so I started to use it for 30 minutes at a time, then 1 hour, then more and more until I can handle 8 hours at a time (break at 4 hour mark). It just takes practice.
Do not ever do this. VR for a person that doesn't tolerate it can lead to days of feeling sick, nausea etc. Some people aren't meant to play it. Listen to your body, when it tells you "I don't feel so well" just stop. Otherwise you'll lose a week of your life and be miserable, if not something worse.
Did this with a car once. It was a controlled enviroment, had one guy on an e-bike with the camera at the top of a poll and then I drove around the track with the headset on. Probably would've worked better if we'd gotten the tires aligned beforehand but it did work.