Let me give you credit, for your first project.... this is an amazingly developed story. I'll save any critiques because quite honestly anything that could be critiqued is minor at best and takes absolutely nothing away from what you've created.
The story every step of the way through your initial chapter releases has been beautiful. Obvious at a lot of steps, but in a very positive way. Certain times you simply just know what's coming up and feel satisfied when it does.
Every character is properly grown and included into the story as well as the subtle but thoughtful ways you've tied them to the mc. Your story may be one of the very rare times, probably the only time, where I haven't been able to lock on to a single character, (I'm personally a very monogamous person, so I tend to always find one character and never deviate in a story) nor did I find any issues in being able to empathize/like each one. (although having a decent amount of experiences dating nurses, I am quite wary of Sarah lol)
I'm going to end this here because honestly I could spend an entire page worth of scrolling praising you for the emotional depths, transitions and flow of your story and I'm sure people don't have a month to read a single review.
Amazing job, and I truly hope you'll continue with this development and keep true to your vision with it because in just what you've given so far... It's become one of my most favorite next to Leap of Faith.