I used Larry Brooks's list below as my entry into plotting. See if it helps you, whether you're a plotter, a pantser, or a fluid outliner.
What is the conceptual hook/appeal of your story?
What is the theme(s) of your story?
How does your story open? Is there an immediate hook? And then…
• what is the hero doing in their life before the first plot point?
• what stakes are established prior to the first plot point?
• what is your character’s backstory?
• what inner demons show up here that will come to bear on the hero later
in the story?
• what is foreshadowed prior to the first plot point?
What is the first plot point in your story?
• is it located properly within the story sequence?
• how does it change the hero’s agenda going forward?
• what is the nature of the hero’s new need/quest?
• what is at stake relative to meeting that need?
• what opposes the hero in meeting that need?
• what does the antagonistic force have at stake?
• why will the reader empathize with the hero at this point?
• how does the hero respond to the antagonistic force?
What is the Mid-Point contextual shift/twist in your story?
• how does it part the curtain of superior knowledge…
• … for the hero?… and/or, for the reader?
• how does this shift the context of the story?
• how does this pump up dramatic tension and pace?
How does your hero begin to successfully attack their need/quest?
• how does the antagonistic force respond to this attack?
• how do the hero’s inner demons come to bear on this attack?
What is the all-is-lost lull just before the second plot point?
What is the second plot point in your story?
• how does this change or affect the hero’s proactive role?
How is your hero the primary catalyst for the successful resolution of
the central problem or issue in this story?
• how does it meet the hero’s need and fulfill the quest?
• how does the hero demonstrate the conquering of inner demons?
• how are the stakes of the story paid off?
• what will be the reader’s emotional experience as the story concludes?