Welcome!
(Picture of Mr Magoo superimposed as Morpheus in a The Matrix picture, just imagine it I’m not near photoshop) 
It is a hard to describe thing, isn’t it? I mean for the price of a decent monitor it just feels quite different, in that if I buy a better joystick then I write things like ‘Yeah, it is better, cool’ but when it comes to VR then ‘Yeah, it is nicer than TrackIR’ doesn’t really cut it as how different it can feel.
Did you buy the Rift new? I ask because if you are planning mainly just for sims/cockpit ‘sit-down’ VR play then you might be able to exchange it for an Odyssey that’s on deep discount at the moment here? They are reducing stock for the new one out last week.
Having said that, the Rift is excellent and I love mine. There’s an intro to the various headset specs here: VR Headsets Comparison Summary 2018.
For framerate and the sickness feeling, the default ‘update rate’ (like a monitor) of the Rift etc is 90Hz, so to help with that many of them allow a framerate of 45 frames per second and then ‘double up’ the frames in something called ‘reprojection’ or ‘Async Space Warp’ (lol, that name). What this means is that for DCS and Elite etc, if you can change your settings to get to 45 fps then you’ll get a much reduced feeling of ‘lag’ that can give people motion sickness. It’s because your eyes and head movement aren’t properly in sync, so you get that ‘travel sickness’ feeling. Tweak to hit a regular 45 fps and you’ll be good!
On DCS because a regularly 45 fps can be hard in all settings (at the resolutions that VR use) then you can mod the graphics shaders a bit to help out here.
The next thing to play with is to help with the clarity in sim, so you can read those Huey dials comfortably while sat back, is to experiment with ‘over sampling’. This means giving the headset a higher resolution than its native display. In DCS this is called ‘Pixel Density’ or PD and is on the DCS VR settings menu. The higher the PD the clearer it’ll be, but of course with a hit on FPS, so it’s a balance. I run with a 1.6 PD on a 1070 and the VR Shader mod and it works well, although the key thing is experiment on what’s good on your hardware (i.e. CPU bound etc).
Let us know how you get on @tempusmurphy, lots of plastic cyclops flyers here to ask!