What the hell is recommended to buy at this point?

Everything confuses me, which VR to buy for my goals, what kind of PC I should buy (like what specs it should have, mind you I know nothing about Gaming PC's, I'm planning on buying one to handle VR). Here is the thing, with the research I've done based on the games I want to play (HL Alyx, Bonelab, Minecraft VR, all on Max Settings, since Minecraft doesn't have "max settings" it'll just be mods that increase the graphics or something), I've been eyeing the Pimax Dream Air SE Lighthouse, but now when looking on this subreddit, I see it has "this problem" or "that problem". And since PC buying seems complicated to me after trying to figure it out, I've decided to save up and buy a 5090 build (idk if it's necessary to go deeper into the specifics of that, if so then let me know), but now a family member (and to clarify, he doesn't play VR, but is the one in our family that knows most about computers) says "you're never going to need that in your life, that's something people in NASA use" (yes, deadass his words not mine, I'm curious as to what you guys think about it, I think it's exaggeratory), so now, I don't know what to choose anymore, I want to save up and choose Lighthouse for the superior tracking I've heard about, I want to have a strong PC to make sure I can comfortably play VR games on Max Settings without needing to worry, but I just don't know what to do, and I would really appreciate honest help, I am pretty worried about asking cause I'm worried about getting flamed for not knowing "this or that" but please, give me honest advice and help