VR do require a somewhat beefy computer. For some, running VR at low frame rate, will give them motion sickness.
This means your GPU will also be really important.
In general, the first generation Ryzen was sometimes a bit flaky, and there have been significant advances in IPC, so wouldn't be a mistake to upgrade.
If you are upgrading CPU with your existing motherboard, I would advice to check CPU support, and what BIOS you need to flash.
[Some motherboard vendors also remove support for older CPUs when upgrading BIOS...
In such a case, your 1600 would stop working. Couldn't fit them all since they cheeped out on the flash chips.]