Tecadmin published a tutorial about installing ZSH on Ubuntu 20.04.
How to Install ZSH on Ubuntu 20.04
The Zsh (Z shell) is a interactive login shell for the Unix/Linux systems. It has multiple improvement over the Bash shell and includes the best features of the Bash, ksh and tcsh shells. This tutorial will help you to install ZSH on Ubuntu 20.04 LTS Linux system.
How to Install ZSH on Ubuntu 20.04