>>313161914
assuming you have a headset
Learn to use unity and learn how to import your creations into unity
[spoiler]At this point the quickest thing to do next is literally just stick a collider on the floor and then upload it into vrchat with the vrchat sdk,[/spoiler]

but if for some reason you don't wanna use vrchat for prototyping your designs, install the steam VR sdk to your project, it's practically plug and play. Now your headset is a simple 3d camera in the unity scene.

if you want something a bit more complete where you can walk around and stuff, consider doing a basic unity tutorial, there will be something along the lines of "how to control a first person character" and stick your vr camera/headset alias onto that and drive it around the scene with your motion controllers

alternatively consider importing into unity a more complete vr solution like the VRTK, although that might be dead, haven't touched it in a few years, or pay for something similar off the asset store idk

But fuck all that seriously just upload it to vrchat and then you can share it with other people which you probably will find useful. Remember that avatars aren't always the same height as the player in real life which might make the perceived scale seem off, but 1 unity default cube = 1 square meter and the legacy avatar Y-Bot is 178cm tall