So you want to know how to make sushi?
Good. You're in the right place.
In order to make a fine japanese sushi roll (or nigiri) you don't need to go through five years of fish cutting studies in Japan, neither you need anyone telling you that your first time ever sushi looks more like a sea cucumber in rush hour out of the water.
What you do need is some goodwill and a good guide to help you through those rough times