Action lines and dialogue combine to show a story to the reader/audience. Your actions lines are long and clunky. Your dialogue is 99% unuseable. These two combined tell an extremely dull fractured story, that unfortunately lacks any kind of imagination.
A script can get away with different styles of written action if the dialogue is good, and the scenes flow, laying out a story for the viewer. This does not. Because the actions lines are bad, and the dialogue is worse, it is agony to read.
An example. Near the end of the script, Lily is shocked hearing about the accident and how her father died. She goes through this monologue "Mom barely spoke of him... she'd change the subject or shut down". Idunn never spoke of Will. How about Olivia? Her Aunts? If she truly cared, she'd have found out. Because no one here has a conflict with her.
Olivia gives Lily a portfolio of Will's work. "It was your father's. I've been meaning to give it to you for a while." Why didn't she? Where's Lily's excitement that this is her dead father's photos, that she's seeing for the first time? Barely turning a page, she finds the perfect photo. Just this little scene, while the thought behind the action is fine, the execution of it is forced and unnatural. There isn't one scene in this that doesn't read exactly the same.
On-the-nose dialogue, where the character says exactly what's on their mind, in the most simple direct way, should be used sparingly. Your dialogue is a mixture of on-the-nose and dialogue that has place in a script. All of your characters speak exactly the same way, mundane and typical of real-life boring people. The overwhelming majority of your dialogue is forbidden in produced screenplays.
This is not an easy fix screenplay. You don't seem to understand the basics of structure. Lily is your protagonist. Yet she has no conflict or goal. We should know both before we head into Act Two.
My sincere advice is to read some books on screenwriting. You need to learn the basics. Rewatch some films you love. Instead of just watching, breakdown what you learn from each scene either visually or verbally.
Good Luck.
