Hi YXQ!
When it comes to close analysis, I find it helpful to start by remembering that the purpose of a close analysis is not the same as a text response (which you are used to): a close analysis is really a in-depth examination and exploration of what's going on in your chosen passages, while a text response is more of a line of argument that you create, support and defend. In that regard, you don't NEED an interpretation like you'd need one for a text analysis - it is enough to explore, within certain structures and frameworks, of course.
Without seeing your writing, I'll give some general advice in terms of making sentences flow. Start each sentence (other than the first one, of course) by grabbing something from your previous sentence to build upon. Writing is like building with Lego blocks - you want to find a bit from your previous sentence to connect your new sentence to - simply putting them side by side does nothing! This can be a phrase, a word, or idea - in some cases you can repeat a specific word, other times you'll find you need to use a different word to avoid sounding repetitive.
