It is possible to receive formal education in scriptwriting, but true success as a scriptwriter comes from practice and developing "a natural ear for dialogue." Doncaster College in the UK, for example, provides a major in screenwriting, but a degree is by no means a requirement to break into the world of scriptwriting.
Key elements of a good script include story structure, proper formatting and character development. It is easy to fail as a scriptwriter if you neglect any of these elements in your scripts.
According to Filmscriptwriting.com, it is easier to get a foot in the door as a scriptwriter if you are simply a writer, not a writer/director. Writer/directors include a lot of complicated camera and directing instructions in their scripts, and this may turn off production companies when they're dealing with a new writer.
Scriptwriters make their own schedules. Successful ones can be selective in what jobs they pick and how often they create scripts.
Becoming a scriptwriter isn't easy. Production companies receive thousands of scripts. They can't give attention to all of them. The best way to kick off your scriptwriting career, according to Educationuk.org, is to write a script and send it to "as many film companies, agents, and producers as possible."