Hey @NishaPsons thank you for trusting ME to frame your story . I don't know why you asked me cause you are a better writer than me.
I read some chapters and I was hooked by your storytelling. The introduction was well written and the characters also match my taste.
I think you can improve you story by adding some things to your story.
For book aesthetic, pick the main vibes of your story (like heartbreak, nostalgia, soft romance), then list images that match also include dedication for your readers.
For character intro, don't just write the names —add their personality, what their vibe is like and an aesthetic list or quote so readers feel them emotionally.