It is must to Lay out a plan of organization. Not everyone works well from outlines, but you should start by drafting a strong introduction that forecasts your central ideas and making notes about the main points you will cover in your writing.
Then organize your notes into some kind of coherent order and choose a pattern of presentation.
Possibilities are comparison and contrast, assertion and support, cause and effect or chronological order.
Any pattern can be modified as you work, but it is good idea to have some plan to help you get started.
You may well want to start with the strategy of drafting a thesis sentence, a single, comprehensive statement that captures the essential content of your writing and tells your readers what to expect. Many instructors require writers to conclude a thesis sentence in their first paragraph.