What do I need to prepare for the first date with this MM?

Since she can go out with you, it means that she is unprepared and has a good impression on you.

Take some money. Buy whatever she likes and give it to her directly. Jokes can be prepared.

But it can't be a dirty joke or a vulgar topic. If she leans her head against you or is close to you when sitting with you, don't reject her because she is attached to you. If she plays with the trinkets on her chest when talking to you, it means that she is not interested in your topic, but she is too eager to get close to you without expecting anything. This is to tell her to relax and find a suitable opportunity to express her feelings, but don't let her make a statement right away. If she makes a statement immediately, it will be counterproductive.

I hope these can help you, and I hope you two can be together. Good luck.