Ignore my previous comment, I did some research and learned it's pretty safe on its own, as long as I don't use it to download malicious or pirated stuff.
I now have sidequest on my headset, but I still can't figure out how to use it to side load your game into it because the instructions weren't specific about that part.
(Edit: I did more research and found out the issue was that I only got the web installer instead of the advanced installer, not knowing the latter was the one that was needed.)