Just make sure your script follows the basic "5 Act" method of screen writing. If it is going to be about 30 minutes, you don't want to have a lot of down time. Make sure you develop the characters well enough. Rule of thumb: make a backstory for each main character and incorporate bits of them...
First off... you don’t need Photoshop or 3DS Max or Blender. After Effects works amazingly well if you know how to use it. I went to film school and learned how to use Adobe Premiere Pro, Avid Liquid, and Adobe After Effects and I still take refresher classes every year to keep up on them. if...