In a comment, you say:
- auto: shutter speed 1/15, aperture f5.6 and ISO it just says auto.
- manual: shutter speed 1/640, aperture f8 and ISO 100.
I then changed shutter speed to 1/100 aperture to f8 and ISO to 400. it took a very very dark picture but you could see something. Is this going to change when I shoot outside in daylight? I've never had this problem inside.
Your manual settings are appropriate for a very bright scene. Indoors with all the lights on is darker than many people realize, because human brains are so good at compensating. So, there's no surprise at all that that comes out dark.
I don't know the auto mode settings of the D3200 offhand, but it seems likely that something has limited its options so it can't get a bright picture -- for example, the maximum automatic ISO may be very low, and something is telling it not to set shutter speed slower than 1/15th (which is a reasonable limit, because there will be a lot of motion blur even at that speed).
My suggestion is to check in the manual for settings related to automatic ISO, and raise them.