What is the best way to implement student and group scheduling in MongoDB?

Question

MongoDB

We are developing a CRM system for an online school and it became necessary to redesign / make sure that the schedule scheme is correct.

There are two main collections in the database - students and groups. When we create a schedule for a group, a copy of it is added to all its students (so that you can pay for the days for each separately).

The schedule looks like this:

export class Schedule {
    @prop({ type: Boolean, required: false })
    paid: boolean;

    @prop({ type: String, required: false })
    tutor: string;

    @prop({ type: String })
    date: string;

    @prop({ type: () => [String] })
    duration: string[];

    @prop({ type: Number, required: false, default: 2 })
    status: number;

    @prop({ type: String })
    message: string;

    @prop({ type: String, required: false })
    start: string;

    @prop({ type: String, required: false })
    finish: string;
}

And as a result, the group and the students get a huge array of objects of this type. Since I was extremely inexperienced when I designed all this, I highly doubt that I did everything right. Maybe. Should it be put in a separate collection? But while the students individually change the objects of this array - for example, the status from paid to true.