I'm surprised a search didn't find anything since there have been dozens of threads on that very subject here.

Briefly, yes, a torque wrench is very valuable particularly for a novice mechanic and even more particularly when working on carbon components.

Ideally you will need two of them, a 1/4"-square drive for small fasteners requiring low torque values and a 3/8" or 1/2"-square drive for higher torque requirements. "Beam-type" wrenches are lower in cost and less likely to go out of calibration with out being noticed. "Click-type" are more convenient but more costly for good ones and have to have their calibration checked periodically. The preset type are much more limited to basically one job each.