My youngest brother has been assigned to the 6th Marine Division

He completed his training around October and was assigned to the 6th Division.
Since he is my much younger brother (an 11-year age gap), I am a bit worried.
He is still quite immature. He grew up being very precious and well-cared for by his older brothers and sisters, so I'm not sure if he will hold up well.
I'm actually proud of how a small, gentle, and somewhat childish kid like him managed to endure the training.
It also doesn't look like it will be easy to visit him.
There isn't much I can do, but if there are any veterans out there, could you please give me some advice on what the 6th Division is like these days?