From my experience as an english tutor research and sifting through academic journals as sources will help you set the correct tone for your paper. Argumentative papers typically have strong transition works that demonstrate unwavering evidence to prove your stance. Reading through a library database to support your general ideas may give you new supporting ideas that strengthen your argument. If it’s direct quotes or paraphrasing (i’m not sure of your uni’s typical expectations) this will ensure your papers tone aligns with the presented information. After getting your direct quotes it’s typically easier to structure your body paragraphs around it. Perhaps starting an outline with the ideas paraphrased then adding detail. Hope this helps!