The main page displays students. From here you can:
It contains the First name, last name, sex, emails and phone number, programme and subject. A session refers to the year in which the programmes and subjects are being taken by the student. E.g if the student is being registered for a 2020/2021 programme year then the session will be 2020.
The session is what distinguishes students from taking the same program and subject.
Click create to save it and it will direct you to the edit page Where you can edit or create another student.
Depending on your setup the Registration ID is manually or automatically created. But the password is created automatically.