I currently have two Aus: a High School one and a College one, they aren't connected but rather are their own stand-alone stories. They are both available in Ao3 if you want to read the full story for each one.
The High School one: From Venezuela with Love.
Carlos moves from his home in Venezuela (hence the title) to Night Vale due to his father's job.
Almost everyone is 18 (except for Carlos and Dana who are both 17).
This one is mostly a slice of life with sparks of plot here and there.
This one also has a LOT of parallels to canon (#1. Pilot; #16. Phone Call; #25. One Year Later; #27. First Date).
Cal exists but he is kind of nice and has a cute girlfriend. He supports Cecilos 100% because it makes Cecil happy.
Also Cecil's and Carlos' best friends are dating, because reasons.
Carlos' last name is Marron.
Mr. and Mrs. Marron support their son and adore Cecil.
Baby!Janice is in this one.
Fluff and cuteness too! Almost no angst.
College one: "Voices in the dark"
Not set in Night Vale, but rather on an unspecified college town on the U.S.
This story basically revolves around the idea of love in the 21st Century.
Carlos is attending college away from home to get his science degree.
Cecil and Carlos meet at the campus' library.
Cecil doesn't study at the college, but was at the library visiting a friend who works there.
Cecil, of course, falls in love instantly, with Carlos it takes a little longer, but he falls hard.
The problem is that Carlos has no idea what Cecil looks like (not that it matters when it comes to his feelings for him).
Carlos and Cecil have an age gap in this one; Carlos is 19 and Cecil is 24.
Earl and Dana are around too, just like Dave, Rochelle and Nilanjana.
A bit of angst, but not too much.
That's like a super basic outlining of them both, but if you would like to know anything specific, please ask me and I will be more than happy to answer!