After weeks of trial and error as a non professional, I have prepared some tutorials showing how to install HestiaCP and post install customizations on my own blog.
Here is the custom installation link: https://angelright.com/172/tutorials-install-hestia-vesta-fork-linode-debian-multi-php
Here is the links for post-install touchups: https://angelright.com/184/how-to-customize-hestia-fork-of-vesta-debian-9
Hope you like them and help you save days of work.