Ok, first of all how much have you covered in class? I’m presuming you were taught content before starting on the independent work, but lmk if not.
If you were given any resources in class, USE THEM - they have been given to you for a reason.
Make sure you use content that covers every decade in the years you need to cover - it can be just one event/policy/etc that happened in each decade. Do a decade per para.
Make sure you’ve chosen your two factors to look at & compare, arguing for the one you think is a greater factor in whatever question you’re answering.
For your historians, again hopefully you’ve talked about some in class/have been given resources. If not, look up credible historians who have researched/in-detail discussed your topic 😬. You are conducting a historian debate, you need strengths and limitations to both of them, including content of things they have said, and also context of the historians writing that may affect their validity/usefulness.
I presume you also need sources as I did on mine? I used 3 sources, I believe 2 were letters & one was something else (can’t remember till I dig it all up). DO NOT do 3 of the same type of source (e.g. do not use 3 letters).
My NEA topic was different so I can’t be of that much help, but I can dig up some planning materials I used so you can get an idea of the structure if that would help?