What I changed

At the top, there’s the 2x11 header for the ArduCAM module—you just need to plug it in. I also added a few more devices (actually kind of switched around their positions and values).
I hadn’t shown it before, but I imported this 3D model and linked it to the display device.
I did a general cleanup and a lot more research, tests, t hings like that.

I’m doing kinda okay. I kept waiting for the sellers to respond to me. But I didn’t get much, I could only get one reply per day. I would send messages there, but it was like 11hrs over there, outside their working hours. A lot of time for nothing… Also, that display manual/datasheet didn’t come with the dimensions of the display assembly, like the total height and the screen size I needed. I found it on a website, and it said 6mm, so I left that to do the 3D design to import the STEP as a 3D model. Another seller said they didn’t have the manufacturer’s data I needed for the camera to check the dimensions and the bus.

I wanted one that was 3.3V, and usually it’s the common 22 or 24 pins. But random ones from Aliexpress can easily change something in the pinout or order, which breaks everything. Here I’m kind of developing the project blindly. It has to be a really precise version, and that’s difficult… I think I’m going to go with the ArduCam module. It’s not small or as modular as others, but for my case it’s probably okay. (until now YES)