How to improve your photo
Patiently maneuver your camera position to achieve the following goals:
1. Increased distance between FG and BG, while maintaining the shortest working distance between camera and baby, i.e. shoot when the baby is most away from the background and you are the closest to the baby.
2. Baby's eyes look directly into the lens. You can use sounds, toys, props, other people, anything that is handy at the moment to achieve this goal.
3. The baby's head, the main light in the room, and your camera are positioned relative to each other such that you get great catch-lights.
Good luck with being very patient and trying many times, because these three together are a demanding bunch of constraints!
To get into lighting in a fun and instructive way, you cannot beat:
The current lighting bible is:
Light Science and Magic 4/e [Kindle Edition]
If you email me and express your interest in learning lighting, I will be delighted to help free of charge.
In the olden days you shot a picture that you liked. In the digital world, you don't shoot what you like; you shoot what Photoshop likes, and only after you get done screwing around with Photoshop (or Lightroom, Aperture, etc.) you might like or not the result. The point is that at the moment of capture you should have some idea of what you are going to do in Post-processing, so that you can do the shot keeping this in mind. Correct me if I am wrong, but I understand that you are using LR but not PS. If that is so, you are missing out only on the most powerful thing on Earth after God. Sometimes I look at the sky and think that God is a beginner in PS, because you can surely make a better sky in PS.
The point of this suggestion is delve head-on into Photoshop as well.
Photography is easy ... unless we do it right!