Making progress in the arts is a process of navigation without numbers.
One of the less known truths about creativity is that it is more important to be productive than to be creative. If you're productive the creativity will take care of itself.
I like writing.
To write a script, it helps to leave design issues to the side. It might sound counterintuitive to write first, but writing a script I find opens up my your visual creativity, because writing makes the idea concrete before I start designing. A small script can help you produce the experience. So for me, a small piece of writing usually comes first.