A pretty important part of script writing is making a character profile. What they like, who they are, where they grew up, what they were doing this time five years ago on a wednesday. You know that sort of thing. A good way to practice this is to find a random picture of a random person on the internet and make up a backstory about them. This is vaguely how you do it.
Name: Guy Fone
Date of Birth: 19/06/1975
Home town: Phoneton
Guy Fone was born in the small town of Phoneton. A mining town who's main export Samsungium. A precious metal used in the production of communication devices. Guy's father, Manson, was the mayor of the town before he was brutally assassinated by Simon Sez. Now Guy must travel the world in search of Simon to exact his revenge and restore Phoneton to its former glory.
Date of Birth: 19/06/1975
Home town: Phoneton
Guy Fone was born in the small town of Phoneton. A mining town who's main export Samsungium. A precious metal used in the production of communication devices. Guy's father, Manson, was the mayor of the town before he was brutally assassinated by Simon Sez. Now Guy must travel the world in search of Simon to exact his revenge and restore Phoneton to its former glory.
And that's character profiles. How you do them and why they are needed is now in your brain.