Improving my writing

I struggle to get my ideas into formal writing, I find it difficult to full fill writing expectations or formats. It is common for teachers to ask for a response to a topic or some sort of writing they want you to restate, tell your response, give a reason why and another reason. I somewhat get why they want that but for me it’s too much dressing up, so when I write I go straight to the point and find it difficult to add details. But now I try to improve and practice by slowing down and thinking about what I am writing.