I looked at your two lighting diagrams, and immediately, I can suggest that you need to bump the main or "key" light's strength up to full power. You have been using two lights of equal power and from roughly the same distance, which is giving a 1:1 lighting ratio--flat, and almost totally shadow-free. If you move the main or key light up to full power and keep the on-camera fill light at half power, you'll get approximately a 3:1 lighting ratio, which will have one side, the main light side, that gets about one f/stop more light than the shadow side. That will create shadows,and will give shape and dimension to the faces of your subjects.
The above lighting ratio of 3:1 assumes that the main light and the key light are at equal distances from the subject. If the camera is much closer than the main light, you might have to use the on-camera fill at only 1/4 power with the main light a full power. I don't want to get too complicated with this right here,at this point, but just kep in mind that the MAIN light needs to be about one f/stop higher in power ON THE SUBJECT than the on-axis fill light's power is at the subject's position.
So, you can easily make this change! Hooray! I applaud your work ethic, and the fact that you're gettin' some shots done! Keep at it!