The branch change policy solely relies on the CGPA. The candidate should have scored an 8.5 or higher in the semester. The CSE branch has tight competition, so seat vacancies are limited here. In such cases, you need to have a 9+ GPA to secure a seat at the CSE branch.
You need to be consistent in your studies to get an 8 or higher in your semesters. It is a bit challenging for a newcomer, as they need to adapt to the new environment by giving equal importance to their studies. So be persistent and attend all classes and labs; then you can easily change your branch