Don't find images

Hello,

I’m jimmy, I’m new in docker
Before create my first image, I would like to test an image on docker hub first.

I have downloaded 2 container on docker hub (command pull, download ok)

when I want to run it (with run command), it say me “unable to find image …”

I try “docker ps -l” to see all container, but I have only one “the test container … hello world”

why could I test an image on docker hub please?