Don’t be like England. First, it’s “only a small area, we don’t have to use careful plans”, and then it’s a town with 30,000 people and extremely confusing roads.
Make a small section for each thing. Eg. “this 7x7 area is for the blast furnace”. Leave a little extra space. You will need it.
Make good paths. Or, if you don’t care, make paths by leaving empty space between sections.
Make an area for “temporary builds”. If you use a temporary machine often, build it permanently somewhere else.
Make sure that whatever you build now, you can make it bigger later.
My recommendation is to make concrete, think about what exactly your problems are, and then build a factory with that in mind. “I need more space” build areas with lots of space. “I’m not close to X” build close to X. etc.