shorter focal lentgh gives you wider Field of view (FOV). longer focal length gives you narrow FOV. GUess both are standard excepts one refers to focal length and the other is FOV.
Don't crack your head over it, just keep shooting and exploring what you can do with your gear. When you find a limiting factor (like not getting the bokeh that you want), then you can consider upgrading. Try getting a hold on the 50mm f1.8. Set the aperture at 1.8 and snap away - i think then you'll get what you wanted.