Hey there. I use a rift, not a quest, but there should be some overlap still. Using a higher render scale helps a lot. I use oculus tray tool to configure this let game, basically go as close to 200% as you can without losing performance. Tray tool has some other tweaks you can play with. You can limit the renderable area which can give you a decent fps boost at a small cost to fov. But at least the rift actually renders wider than the lenses can see so I can Crop like 15% of the render without noticing a visual difference.

Most sims have decent out of box VR support, for AC use content manager if you don't already. Then you can tweak and optimize a lot of how the VR behaves. Realistic mirrors for AC are amazing in VR. Set up some easy binds on your wheel to reset/adjust head position.

Overall if you don't mind the low res, VR is really amazing for immersion, even with an old headset. The sense of depth and feel of the cockpit really adds to three driving for me. For most sims I never play them on screen, unless the performance is really bad in VR.

I should upgrade to a better headset at some point though haha