A semi-auto action does not cause you to fire more rapidly with less consideration of the target between shots - this comes from personal discipline.
Having said that, I would recommend a bolt action for your first rifle, and the .22 rimfire cartridge.
In my opinion, you would be served very well with an older Remington rifle from the 40's or 50's, such as a 513T, 521T, perhaps a model 37 (these all have target rifle features, the 513T and 37 are true target rifles, although not competitive these days). Kimber's have a spotty quality record, although they are generally good, I wouldn't recommend one as a first rifle.
Your more pressing need is to get hooked up with a shooter or club that can allow you to get hands on experience. The college you choose may have a rifle or shotgun team, or a ROTC unit (however ROTC is not just about shooting).
A very good source for initial training are conservation department programs in many states; contact the state or local offices and ask what they have to offer.
The following link will yield several clubs and instructors in the NYC region -
http://www.nra.org/frame.cfm?url=http://www.nrahq.org/safety/education/basictraining.asp
You should also look round the NRA web site at
www.nra.org
You are on the right track; keep looking around, learn what is right and what is BS, and start shooting.
One other idea - consider attending camp at the NRA Whittington Center in New Mexico - you will get exposed to all of the shooting disciplines. Use caution, however - the clean air, open spaces, and low population density might change your life.