I usually try to expand each bullet point to 1k-2k words of details and directions about how I want the scenes to go. Example: “Character A goes to Character B’s house. Describe Character B’s house. Symbolism idea- old furniture symbolizes holding onto the past. They discuss [inciting incident].” Example: “Character B, after Character A leaves, calls Character C to tell them about what they talked about. Dialogue idea… ‘blah blah blah’- B, ‘Blah blah?’-C, ‘Blah blah blah!’- B.”
Furthermore, I find it helpful keeping a collection of what I want the themes of the story to be and the character motivations. Also, get an idea of what you want your protagonist(s) to be at odds with. Is it a force of nature? A betrayer in their friend group? An evil government? A villain? Themselves?
In my story, that translated to my protagonists and villain both not fitting into society and being rejected because they are different. Protagonist A loves being different and just wants to be left alone, Protagonist B wants to change to fit into society so they can have a community, and the Villain wants to change the world into their image so they’d stop being different (and control people)
Of course, man! And have soooo much fun doing it! My last bit of advise is to do at least two edits of your work before you post it. The first one is to change words, add or delete things, and look for plot holes. I also recommend reading stuff out loud during this stage to see if dialogue sounds natural. After that, I put the chapter through grammarly