Photography: Piano, More Aperture, and Shutter Speed

I was messing around with Shutter Speed and Aperture this afternoon, and here are some photos I've taken:

 Shutter Speed 1/15 and F-stop 5.6

 Shutter Speed 1/15 and F-Stop 5

 Shutter Speed 1/15 and F-stop 5

 Shutter Speed 1/15 and F-stop 5

 Shutter Speed 1/15 and F-stop 5 

 Shutter Speed 1/15 and F-stop 5 

  Shutter Speed 1/15 and F-stop 5.6

1/15 Shutter Speed and F-Stop5

 Shutter Speed 1/30 and F-stop 5.6

 Shutter Speed 1/30 and F-stop 5.3

I am really enjoying taking photos, and I know I'm not amazing, but it's a working progress. I think that photography is a very big gift from God and I hope and pray that I honor Him in and through it! Any tips woule be great :)
xoxo, Lydia