I have been using A ryzen 3 2200G build with 8gb ram for a few months now and I plan to get a GPU in october at a local convention that has great sales but I'm not sure what will be a good Nvidia card to pair with it for VR that won't bottleneck or be a compatibility issue, I know most people will recommend that I wait for the 11 series to come out but I don't plan on looking into that until they are actually announced.
EDIT: Thanks for all the advice, I now plan to buy a new GPU at the convention and then buy a cpu and VR headset on black friday or if there is a good deal on one before then.