Delirium enemy spawn's, and delirium mirror visibility issue

Hi
I frankly have no idea what I’m supposed to be doing in delirium, I’ve looked online for help and still not sure. I start by walking through the mirror and the whole screen goes foggy white, and I can barely see some shining areas and this is part of the issue ggg can you please highlight these and make them more visible( especially if your on a console sitting with the tv at normal viewing distance and not got your face up to a monitor playing on pc) as if you have vision issues they just blend in with the fog ( I believe they are called fractured mirrors but they don’t look like a mirror). I see a few groups of enemies while I run around blindly but then just run around looking for enemies without finding any then the timer shows about 4 seconds and then runs out but I don’t know how to extend the timer especially when it says 4 seconds. is it because I couldn’t find enemies? Are you supposed to run into the “fractured mirrors”, how do I get more enemies to kill and extend the timer, and how do I get more rewards as I’ve never got past 2 ire rewards.
It seems a lot is assumed in this game in that they believe you have played the content in poe1 and know what to do, where I haven’t.
The feedback is this needs explaining in game as many new players will be like me and think this is terrible, with no rewards and no point in doing, also the visual issues of the mirrors not being easily visible in a sea of fog is very difficult to play especially on a very short timer, at least in breach you can see the expansion and retraction of the area, but delirium all I see is the screen covered in white, with no idea if it’s expanding like breach or the whole map is just white. I also think the rewards are terribly low but I guess that’s because I’m not doing the delirium correctly. Please consider and make this understandable and navigable. Kindest regards