This should not be hard, so try and think of some of the things your library lacks. So you should have a small introduction (2-3 sentences), and try and put the main idea of your next paragraph into the last sentence of your introduction.
You may want to talk about what the library lacks (Internet access, audio-visual support, is not up to date with the newest, trendy books, does not offer suitable help to people with disabilities etc.). You can talk about all of this in one of your paragraphs, and use the conclusion to quickly sum up your main idea.
Good luck!
