Every engineering branch u choose have it's own advantages and disadvantages. It's not about which is better branch every engineering branch has challenging work in it. 

Never mind that you didn't take computers in class 12, in engineering they will teach you from the basics.So, that doesn't mind.

1. Civil Engineering : if you managed to understand subjects of it who knows you will be designing or constructing another architectural marval.
2. CSE : if you make yourself good at programming skills then u may developing another social media or internet major such as Google or Facebook…

So make it clear in ur mind that every branch requires patience and hardwork if u want to excell in it.