So how to use my zines since they are mainly composed of illustrations?
One interesting way, is to start by asking the players what they think the illustration is.
Use their answer as a hint to be on the same page, build on this or twist their answer around.
To do this, it's important to show the illustration to the players and to let them interact directly with it.
Every details should matter (or not, some can simply be decorations).
The players should be able to manipulate and interact with most of the details.
Naturally you will have to improvise what their manipulation trigger but this is where the fun is.
Some questions that details can trigger: