welcome!!! i'm on Tapatalk and can't see the pics unfortunately, but i'm sure donnadudette2003 is right with her assessment!
i have a new hatchling too and she looks thin, but they're young and will fill out before you know it. here's a feeding guide that a lot of us use to properly feed our noodles.
EDIT: i'm able to see the pic in the thread preview and the snake does look very thin. keep up with feedings and the snake will do just fine.