Nice first kit. You are ahead of 99% of most everyone else.
I agree with removing the lightstick and gloves.
Add bandaids, etc
You could also gain some space by rewrapping the thread around a small metal or plastic thread bobbin used to hold thread in sewing machines. Just go to a fabric store and ask where the bobbins are...the ladies there will show you and you can look around.
Add a couple of needles as well.