Most schools prefer to focus on the content for the first 3/4 of the year, then fine-tune your exam approach in the last few weeks, which is the logical approach. So long as things are legible and sensical there's really no need to worry at this stage.
As a general rule of thumb, a question worth, for example, 3 marks will need at least 3 lines of working out, but you'll generally have to work through these to get to an answer anyway.
Once you know the content, demonstrating it properly will be pretty easy, once you get your head around having to write this-->
∴ a lot. Maybe get in the habit of labeling points as coordinates (simply writing an x intercept as 3 is insufficient, has to be (3,0)
Worst case scenario, you're a messy English thinker like me, and you can just rely on a hell of a lot of "flowing logic" arrows.