Hey lols, Have you tried this link: https://www.jaycetutoring.com/posts/jmss-y10
This guy has done the exam before and is really helpful. He is helpful for the writing part. For the report its better if you follow the prompt. If the method and results are provided then all you have to do is write an introduction ( aim + hypothesis) and then the discussion and conclusion, if it tells you to design an experiment then you have to include everything.
Also in the intro its good to add a background for the experiment, which explains what you are doing with scientific concepts.
Hope this helps.