Ok, that’s everything except the GPU ;), but it gives me a rough picture. I think maybe you have a RTX4050 6GB GPU.
You will run out of VRAM pretty quick with that. Ideally UE needs 8-12 GB VRAM for dev work.
But you can probably get things going again, by working in a reduced scalbility
Try High or Medium.
If you’re still having problems, then it’s probably due to textures. You can change the LODBias of all textures in a level at once with the console command
r.MipMapLODBias 1
or 2, for instance.