A writing assignment is like a door that won't open if you walk straight across the room to it. Instead, you have to cover every inch of the space, and talk to yourself about everything in it and what it means. Then it's time to get rid of a bunch of stuff, rearrange what remains, dust it all off and keep tinkering until the door pops open by itself.
Yes, this is a bit weird and obtuse. So is writing. For example: this thing called a thesis. Your main argument. The thing you're going to prove with quotes from the reading. So often, your first formulation falls apart under the weight of your evidence, and you find that your conclusion brings it all together. Great! No.
Move it up to the end of the introduction, where it belongs. What's in the conclusion, then? Better to answer the question, "So what?" You've proven your point, now what does it mean? Not just what you learned as the reader, but what you'll do with that knowledge. What would the author want?
But I thought I was done! Don't make that the goal. Keep your prompt and process notes next to you and continue sifting. It's a slalom course, not a drag race. You're cracking a code, not ripping open a package. Pace yourself, proceed gently, repeat things, talk out loud. Play.