It’s really, really nice. I love how your avatar overlaps the words “National Geographic.”
The render is also quite nice.
The only thing I’d change is to make the border yellow if you’re going for the true National Geographic feel. But it is a stylistic choice, and you’re not forced to make your change the color of your border.
I like how well the render blends in with the rest of the artwork. I would suggest changing the border to a shade of yellow since the red border gives it more of a TIME Magazine look. Besides that, I think this is overall great.