Question: Is it possible using only the console (cli) to create domains, add apache directives, create email domains and email accounts? regards MaX
No, at least not directly. But you can use the ISPConfig remote API to write cli scripts to create websites etc. in ISPConfig.
There is someone from the community who build something like that: https://forum.howtoforge.com/threads/ispconfig-cli-bash-cli-tool-merged-feedback-needed.78906/