Before you begin your story, I’d recommend reading what it should include and not include (the Episode guidelines)
Read below for more on this:
After this (or before), you can begin plotting your story, making a outline for it, creating the characters and all that 
I would start with Joseph Evans’ tutorials on Youtube:
Start here:
https://www.youtube.com/watch?v=rZ4jy2UFWHk&t=2s (He has tutorials in classic, ink and is in the process of working on Limelight tutorials)
You can also check out this website on directing tips:
https://episodeknitters.wordpress.com/tips-and-advice/directing-tips-help/
@ Dara.Amarie , @Apes , and @ RudeInception provide amazing helpful threads that you can check out
Really, the forum is full of many helpful people that you can get help from : )
The Episode guides are also a great place!
Good luck with your story and remember, practice makes perfect!