Clark Kerr has the largest rooms and is in the midst of Frat Row. But it's the farthest from campus. The newest building, Blackwell, should be your first choice, in my opinion.
Unless money is a major concern, I would recommend living on your own. You're an adult now.
There are singles, doubles, and triples. Most rooms are doubles/triples. In the units, doubles have the beds on opposite sides with desks in the middle. Triples have a bunk bed and a bed on top of a desk. It's hard to describe, and I'm sure there are videos online from either student vloggers or the Res Hall Website.
No. If you're in a suite, it's shared with those in your suite. Otherwise, you're sharing with the floor.
There are CS majors everywhere. This shouldn't be a major concern.
Why are you asking us if it's feasible or practical? I don't know you