My first attempt with paper (I tried the boots a few days ago with procreate). I tried to make the sketches using the least amount of time possible, two minutes for the snail, five minutes for the camel and ten minutes for the skull. I only used HB for the basic shapes and 2B for the finishing lines.

I tried with the boots, I still have to do the snail

I'm trying with Procreate. What do you think guys?