inspiration zaps the brain. It's a really great idea and something you don't want to forget. The first thing should probably be, make a sketch... fast. So the sketch is made and you are considering nuances in the idea. Another sketch. After a few sketches and some head scratching things are coming into focus and now is the time for a little more sophisticated drawing. If you were lucky enough to have drafting in school, that was probably a long time ago (no grey hair) and you may not have had any drawing since or even had any drawing classes. Here is a very quick how to/ reminder on some basic drawing techniques.
https://design.tutsplus.com/tutorials/w ... vector-893Then again, there is some excitement in working on the fly and hip shooting an idea