I was also a tech comm undergrad.
I definitely don't think you're too computer-oriented. A lot of tech comm programs desperately want students who are more hands-on. They're flooded with applications by Creative Writing Majors Who Can't Find Jobs. But the key to technical communication is understanding the science/technology you're writing about, so that you can explain it more clearly. Technically oriented people are at a great advantage in that aspect.
The level of acceptance and comfort you'd find in the program will really depend on the school, however. You'd find your niche in a tech comm program housed in the engineering school (ie. University of Washington) or a program at an engineering school (Michigan Tech, RPI).