...and you're ready to write your screenplay...[insert hours, days, weeks, months, years]...and you're ready to write your screen play. :)
Reading and writing screenplays for the first time is like learning a new language. Like a song, you can't sing the tune (at least properly) if you don't know the words.
Start by learning the words to, "I'm ready to write my screenplay."
This web page from SimplyScripts shows some common and not-so-common words.
Awesome! Now go write that never-before envisioned fantastically awesome screenplay!
The Basic Filmmaker