I have written the test twice and met the minimum standard both times. Feel free to message me with any specific questions.
In general, though, just use the essay format you learned in high school English: Introduction, 3 body paragraphs (first point, second point - which is the least strong, third point), conclusion. Make sure to quote (and correctly interpret!) the prompt at least a couple times. I would not waste any time planning your essay, but know your thesis and 3 arguments before you start writing.