There are lots of sample answers for writing task 1 and 2 in the lessons on this blog. If you analyse them carefully, you'll learn about planning or selecting ideas, paragraph building and sentence structure; you'll also find some good vocabulary ideas that you can 'steal' from me.
Another thing you'll notice is that my answers are not perfect (although they are good enough for a band 9). There is always something that could be added, or an idea that could be better developed. But this is normal when you have a time limit, and when you're only expected to write 150 or 250 words.
Next Thursday, I'll write a short analysis of the writing task 1 answer that I shared earlier this week (here). Maybe you could analyse that answer too: what can we learn from it, and were there any imperfections?