Help needed from a senior

Realistically speaking how possible is it to get a branch change to either cse or any other electrical branches.

I'm going to be joining bits with the sole reason to get a branch upgradation (which is risky) . Inevitably I'd need to score a very high cgpa , which I hope wouldn't be impossible tho very daunting.

Would any senior be willing to help with notes and give a lil bit of guidance. I would greatly appreciate any help.