Update: Managed to get it working, the project in question had the issue of way to many PBR textures, to many vertexes (I had 2 particle systems of over a million), and much more :)
In any case, thanks a lot for the helps!!!

It could probably be GPU lacking, but that would be strange since the 2060 could easily render it and right after it went to "out of system memory", then I upgraded to an 8gb GPU, so it should probably work right?

Hey, I'm using a lot of image textures from the Poliigon addon, I have no idea if they're 4k, but since the plain im rendering is so big, I've repeated it a lot, and also put some mosaic nodes over it. I dont know if that might be the problem. However, I've just noticed that with .blend files that are NOT packaged, the rendering goes well.
This was only for a water texture, and when I tried rendering it in Blender 3.4.1, It crashed. As well, I render at just casual 1920x1080, and the big file does indeed crash.
Howerver{F14137669}
The weird part is, this file is almost the same size, uses the same typa particle systems, as well as having the same Poliigon textures. And this one renders absolutely fine, hell it renders for my feeling extremely fast since the GPU is brand new. Anyways, I'm gonna try tinkering around with the sizes themselves since it luckily still opens. For all parts, thank you for the