greetings,

CSE is no doubt the safest back up option as of today, better than civil but please bear in mind that CSE can also be time consuming and kind of challenging if you get deep into it as most CSE subjects you study will be something new for you. You need ample time for your government job prep so take into consideration the time consumption factor of both branches, civil in comparison to CSE is not that hectic I'd day.

You also have the added bonus of an almost guaranteed job after doing CSE as well as higher studies options open. Unfortunately most All India government jobs in administration won't require CSE knowledge but civil can be used as optional subject.

good day