This is good.
If you download ViewNX2, then also download Capture NX-D.
View is a much better program in that speed and stability isn't an issue, whereas Capture NX-D is a very badly written software.
But CNX-D has features that VNX2 doesn't, and noise reduction is one of them(as well as many others). But in this instance it's the NR feature you will want to try.
I don't use CNX-D much simply because it's slow and generally unstable, and I have Capture NX2(which does everything), but I have it and generally use it just to see how well(or more accurately badly it's working), but the tools in CNX-D are handy to have if you have some patience.
Then, as you said, you can convert to jpg to edit in some finishing touches to an image. You could try to use the tiff option instead of jpg, but I don't think it's worth the hassle.
If you find that you could use tiff to advantage later on, you can revisit this option at a later point in your learning curve if the need arises.
Tiff can provide a higher quality file type to work with than jpg does .. but for most people just starting out jpg is more than fine.
The important point to remember is that once you have the raw file, the other files types then follow.
Doing this(for now) your workflow is then all free.
Once you have some experience with understanding what to do to an image in (PP)Post Production, you can then safely convince yourself that paying for something like Lr or Adobe's CC software will be worth it.
This is just my point of view, and hence just a matter of preference, but I've already purchased LR. But to be honest it was a waste of money. Not because it's no good, more so because I hardly ever use it.
I start with ViewnX2.
I sometimes try to open an image with CNX-D, but this is because I can understand just from looking at an image if the tools in CNX-D will do what I want for an image.
More often tho, if VNX2 doesn't do what I want to an image, I then open in it CaptureNX2.
If I need any more intricate editing, I also prefer to open the image(usually a jpg) in PDN .. for example if I need some cloning/healing.