I feel like you really nailed the 19 year old persona.
Vapid, semi-braindead, just moderately smart... yep. Sounds like a 19 year old to me.
Not sure if it's just me here but the writing is getting a bit too small for me to read. had to start zooming in to make it out :c
Sorry about the tiny lettering. I did the page entirely digitally, and sometimes it's hard to gauge how small things will end up once I resize the page.
I always feel like I should preface any scene with Jay with the fact that she is 19.