Hey there

The main things a student learn in software engineering are mentioned below :

1. Study about Research, Design and write new software programs.
2. Study about those programs  including business application, computer games etc.
3. Study about Develop already used programs by analysing and identifying areas for modification.
4. Create applications for big business houses.

For more:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/careers/software-engineer&ved=2ahUKEwjB3Kikg7HzAhUbQH0KHdJ8DUUQFnoECAYQAQ&usg=AOvVaw1OkZzBk0MnwkPYZNeB5FX2