I don’t know much about that camera either. We film with a DLSR that cost 2 grand used. (I just say that because I think that it’s quite expensive to make high quality videos, sort of unlike music where budget gear can do a great job. I might be wrong though.) One thing I would do if I were you is take a look at some demo videos shot with the camera you bought to get an idea of what kind of shots it can achieve. Is it capable of the kind of shot your going for?
If it is, then it’s going to mostly be down to lighting. Here’s a still from a video I made a while back that is a little bit like what you’re going for, with some gentle lighting in the background:
And here’s another one I thought was cool, also with some gentle lighting in the background:
FluteCafe is right about there being a lot of YouTube tutorials for lighting. That’s how I learned. There’s basic lighting techniques that you can apply to your shots to get them to turn out how you want. You probably need more light than you think, even for a dark shot. You have to play with the camera settings to get the right balance…I think it might be called white balance. ISO. Aperture. I don’t know I usually try to get my wife to do that part, haha. For the first image there I had bought some pretty expensive LED lights, but for the second one we were just using those dorm-room style lamps from IKEA that each take 3 bulbs. They worked okay too, but you have to play around with it.
It looks like you’re using overhead lighting, which is actually okay if you want to light the room a bit, but you have got to have some BRIGHT lights right on you guys, then get your camera to tone down the brightness of the overall shot. Then a bit of it might be down to how you edit the video. You can put filters on it to play with the overall tone. But you’ve got to have a good source to start with for sure.