You are confusing depth of field with bokeh. A larger aperture provides a shallower depth of field; compared to a smaller aperture, there will be more out of focus. Bokeh on the other hand is just a description of what the out of focus elements look like. A lens can have good creamy bokeh, or bad nervous bokeh, but a lens cannot have more or less bokeh.
So...a f/1.4 lens has a shallower depth of field. That isn't necessarily a good thing, especially for a new photographer. If your focus is off by just a few millimeters, your image will be ruined. An f/1.8 is more forgiving of a missed focus (but it is still not easy either). I personally think it is a mistake to rush in an buy a 50mm lens just because people have told you it's cheap and good, and that you need a wide aperture to create blurred backgrounds. You don't. A blurred background is created with not just aperture, but also focal length, distance to the subject, and the distance of the background.
As for the D3200, preliminary tests looks pretty good. But a new-to-market camera always costs a lot more than the outgoing camera. Unless you have to have the latest product, the older D3100 will be hundreds less in price and probably near as good. You could also buy the better D5100 for the same price as the D3200.