Looking good.
I second Ricardo"s thoughts on the use of the flash. You really want to position it/soften it to get rid of the glare on the subject. You can try the flash outside the photo tent.
Also if you have some type of daylight/UV filter on your lens (often sold with a kit, and to "protect" the lens), take that off.
Lots of trial and error, make sure you keep tabs on what you are doing so when you get to the best result you will be able to quickly repeat it.
You have made great changes in just a short time. Just a little fine tuning....!