>>277748440
The early VR games that use teleport locomotion are the most comfortable to play but just playing anything will work towards getting your VRlegs. Don't try to bruteforce it though, stop when you feel at all sick. 
Stuff like Budget Cuts and Crisis VRigade tided me over until I could play games with movement like Pavlov or Blade and Sorcery, even then I had to take it easy for a while. VRchat in seated mode with the third person movement was also comfortable and easy to play for hours at a time so long as your FPS can keep up. A fan at the front of my playspace pointed towards me helped a lot too.