So I actually did that with just basic resources - Steel, Copper, Caterium, Quartz, Aluminum, Rubber, Plastic.

It's a huge pain in the ass to do honestly. And that is with very limited inputs compared to your idea

If you really want to do it I'd suggest splitting your stations into high- and low volume. Low volume stations can be used by multiple inputs using a splitter system while high volume stations are single input only. This will greatly reduce train station count later on.

Make multiple floors, dedicated for inputs, outputs, storage and logistics. Especially the logistics floor will become absolutely massive and messy if you want to supply your entire world with it. You will need a lot of space. Also label everything you do.

But still, it's probably not worth it. There are so many issues with it you'll be spending more time debugging than building.