Error: did not resolve to an alias and no unqualified-search registries

[Onisoya]

Firstly, please why do I see this at the end of the output:

Error: missing command 'podman image COMMAND'

When I run:

'docker image' ( or 'padman image' )

Secondly,

I am learning docker for the first time ( it means to be resolving to podman) and I tried this code from TryHackMe:

$ podman run -it helloworld /bin/bash

and this is the error I'm getting:

Error: short-name "helloworld" did not resolve to an alias and no unqualified-search registries are defined in "/etc/containers/registries.conf"

Please how can I fix this, BTW this is my first time with playing with containerization.