Be part of an independent film

I have a friend who has done a film course and interested in making something Matt2Jones, Sairus and I have been writing for about a year now. It’s a short novel (or at least will be some day) written in a very disjointed fashion, hence the name: Disjointed. More on this later, but the main thing to be done is adapting our novel based idea to script form. Any pointers on how to do this (properly) would be helpful, but we’re making a stab blindly until we learn some proper script writing techniques.