>>366243568
I had it bad and nearly refunded VR at first because it made me so sick. I couldn't use it for more than 15-30 mins per day for the first week and if I went past that I would feel sick for the rest of the day. Even beat saber made me ill. 

It improved quickly by playing seated games with a fan blowing air straight at me, being well hydrated and not having an empty stomach. By week 3 I was playing slower smooth locomotion games for hours without issue and maybe 2 months after getting VR I was comfortable zipping around in high speed games.