Here is the full list of all 10 First Snow achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Browse the Guest Art Gallery
Finish the story for the first time
Meet Caprice and Millie's roommate
Begin Act 3
Go on a short but sweet road trip
Begin Act 2
Meet the leader of the campus' writing club
Begin Act 1
Get wrapped up in Caprice's enthusiasm
Unlock the secret option, and then disable it