The job of your title and the first sentence of your essay is to get your reader's attention and make them want to read the rest of your essay.
Remember that your conclusion sentences should focus on real life, which is (generally) more relevant to the average reader than the text you're referencing. The ideas in your conclusion sentences are a good place to look for topics and ideas that you can reference in your title and your hook.
Keep your title short and sweet. You want it to be interesting, so dragging your work down with long sentences, or additional ideas can make your reader lose interest before they even get to read your first sentence.
Relying on humor or poetry can be a good idea. Most people are more likely to follow their interest if they have an emotional reaction, so a funny title, or one that simply sounds beautiful or compelling can be enough to get your reader interested.
The job of the hook is to keep your reader interested. (Think about the name we use: if the title is the bait, your first sentence is the hook). The hook be broadly interesting. In other words: there should be a chance that any random adult might be at least a little interested in the idea that your hook puts forward.
Some styles of hook that work well include:
Questions
Truisms
Controversial statements
Here are some examples of hooks that have worked well in previously submitted essays:
We can all agree that racism and sexism are bad, right? (From a persuasive essay arguing that Of Mice and Men deserves its place in the ELA curriculum)
Are humans merely puppets of fate? (From an essay analyzing the role of fate in Romeo and Juliet)
Fear is a powerful emotion that can spread like an infection. (From a theme analysis essay about The Crucible)
Writing a hook is a creative process, so there isn't necessarily a correct or incorrect way to do it, but it can be helpful to try to experiment with many different ideas or options, and to seek feedback on the various options you've developed.
Following the hook, you should expand on the idea in the hook for a sentence or two. This helps to ease your reader into your essay, but it also helps to prevent your essay from jumping too quickly from one idea (your hook) to another (the text). The explanation of your hook lies between your hook and the first sentence about the text itself, so jumping directly from a broadly interesting idea in your hook (which shouldn't mention the text) to a sentence that is only about the text can leave your reader feeling confused, as the connection between the two might not be obvious.