The goal is to get your ideas down as fast as possible. Think of it like a brain dump—just write everything that comes to mind on each point. You can refine it later. I can suggest you this AI writing tool https://www.linkedin.com/pulse/smodin-alternative-top-10-freepaid-alternatives-tool-nayeli-ellen-eykbf/ to help you with your writing. AI tools are quite popular today and they are really helpful in writing and proofreading. Recommend to try.
Start with the thesis then. Just make it a simple, clear statement that answers the essay prompt. It doesn’t have to be perfect; you can tweak it later if needed. Once you have that, the rest will fall into place.