I read much on zsh, but I seem to be too invested in Bash to change. Is there are good migration guide for someone with a moderately complex ~./bashrc and a lo

I read much on zsh, but I seem to be too invested in Bash to change. Is there are good migration guide for someone with a moderately complex ~./bashrc and a lot of aliases in ~/.bash_aliases? I seem to recall doing an Arch installation a couple of years back and the zsh instance was well done but none of that setup was installed on the system even with zsh installed. I suppose I could have copied it from the installation media but didn't think about that at the time.