The 'easiest' workflow solution is probably shooting .jpg in sRGB colorspace and doing simple adjustments afterward. You'll have a file that contains the viewable image, is easily shared and looks pretty much like what you see on the back of the camera. A large host of software will handle these files such as PS-Elements, Picasa, etc. Not a lot different than using a P&S camera.
Many of us choose to shoot in raw format though to obtain the advantages of greater bit-depth and much more latitude in post-processing than a directly rendered JPEG or TIFF allows. As you are using NX2, I assume you're shooting raw? Getting a grasp on the fundamentals of raw sensor data (.NEF) + rendering recipe (all those sliders) = viewable output file (.jpg/.tif)?
Lightroom was designed to be a photographic-centric environment that includes a raw image editor, image management tools, multi-image printing layout, as well as web-hosting and slideshow viewing. Some folks like to minimize the number of apps needed in their workflow so LR accomodates this pretty well, others like to choose specific "best-in-class" apps for each step and build their own workflow environment. These choices are highly individualized which makes it difficult to recommend a specific solution - and is why most sw vendors offer 30-day trials of their apps.
I won't try and summarize the nuances of the which sw is better debate - search the threads for some insight there and give them a try. I will say that making an informed choice - AND REALLY LEARNING - the software you choose will go a long way to having a productive workflow.