^^^ Lovely pictures

Well done.
Take a careful note of exactly what settings you've got, especially regarding power and distances.
I'll just say this when setting up lights: there's a thing called the inverse square law which means that when you double the distance from the light to the subject, the brightenss falls to one quarter - which is two stops. That's the difference between bright white and mid grey. Flash light falls away very quickly so if you don't position the lights exactly as before, the exposure will be out. Of course, you can use this to your advantage and adjust the exposure by moving the light a bit.
Bigger lights give softer illumination. So it's soft with a big softbox or umbrella, and much harder and more directional with smaller reflectors, ie stronger shadows. Moving the light closer makes it bigger relative to the subject, so softer, but beware the inverse square law here because if the light is only a couple of feet away for lovely soft light, moving it only a few inches, or if the subject moves a bit, will alter the exposure. The light will also fall off very rapidly so the background will be much darker.
Juggle these two factors - size of light and distance to control the softness and light fall off.
You are already finding that you need a lot more space for studio photography than you might think. Space certainly makes life a lot easier, especially when you need to fit in background lights or effect lights, but there's usually a workaround with a bit of ingenuity. Time to work in that background light now
