Hello there!
To begin with, congratulations on your endeavour to make a period drama film with such an engaging story.
Even with the minimal information provided, I can see that this is a story about the drastic changes in the Nigerian political and religious landscape told through the eyes of one family, particularly the husband, father and head of the family. He's torn because the only way of life that he'd known and followed till now is being challenged and he's being introduced to, from his point-of-view, a radical new way of living. Everything that he held dear to him is being challenged and he's questioning what his individual values are, and ultimately, how to have a better relationship with God. And the associated feelings that arise from embracing the Christian faith.
About me, I've been a screenwriter since 2010, having written for over eight TV channels as well as two feature films, one of which is under production. I also recently completed a one and a half year Screenwriting: Film and Tv Comprehensive program at UCLA in Los Angeles.
The first thing I'd do, if I were to get this project, is to define the theme which will underscore the story and then create an outline for the entire story, complete with the Act breaks and a mid-point. Followed by character sketches for the primary characters, and then do a first draft of the screenplay.
Feel free to contact me with any queries, or writing samples.
All the very best for this film and have a wonderful day.