Some questions!

Hello ! I'm back after a few months !!
After getting used to my first corn snake, I recently got another one, but I didn't expect her to be so young/small (she's only 1 month old :') )
I have some strange questions to ask, I still haven't tried to feed her (waiting for her to de-stress) but the previous owner did say that she ate 6 times already !

So, for the questions:
1- I noticed that when she's tongue flicking her tongue always "lick" herself, it always flick upwards and onto her "muzzle", I haven't seen my boy doing that , what could it be? Just being silly or she's smelling herself??

2- I don't know how Corn snakes musk should smell like but she came with a really strong odor onto her skin, my male is odorless but she smells like a really potent piece of earth /foliage , she was inside a small deli cup and there was a spot in there that didn't look like pee nor poop , could that be that she musked inside and rolled all over it and that's the strange smell she's producing?

3- I caught her 'yawning' after "waking up" and walking around the enclosure, it was a one time thing but my male never did that so I guess I'm kinda scared lol is that normal? I checked her mouth and there was only a small really small stripe of saliva, no bubbles and no excessive saliva, she did drink water before this though.

Thank you and sorry for the extensive questions I'm really worried because she's so small and delicate I don't want anything bad happening with her !