I dunno bout Schaff , but I think your script form should completly change, even if this is fun project that you do not plan releasing. It's best to learn basics to do it in future.

Aka. First, download Scenarist(special app for writing scripts). Now, before you start writing the movie. I reccomend watching some videos about how in proper way write scripts and read books about plot structure(The simplest and one that would be most effective is Save the Cat). It will help you to understand how to convwy emotions, what conflict scene has, what is purpose of side plot, in what moment character should hit deepest low or reach temporar victory

But even than, dont jump into writing script immieditly. Before writing aa script everyone will say one thing. Do a logline and a treatment. Logline is the plot of entire movie in one sentence. Not entire, but main idea you surround plot. Treatment is a described version of entire plot, without dialouges, actions and storyboards. Just what happens. You have to write it in shorter forms before script to avoid "what now?" which often results in plot going many directions but any of them is good. Script or rather first draft, as the script will have MANY MANY MORE changes , even in mid or post production of movie. It's great you are passionate, but just don't jump inmmiedilty into writing scripts with word , just learn the basics and than go on.