Mostly copied from https://scriptingosx.com/2019/06/moving-to-zsh-part-3-shell-options/

Put into ''~/.zshrc''

* Prompt:

  PROMPT='%(?.%F{green}√.%F{red}?%?)%f %K{81}%B%~ %#%b%K{default} '

* History:
(See also https://unix.stackexchange.com/a/111777/7286)

  HISTFILE=${ZDOTDIR:-$HOME}/.zsh_history
  setopt EXTENDED_HISTORY
  SAVEHIST=5000
  HISTSIZE=2000
  # share history across multiple zsh sessions
  setopt SHARE_HISTORY
  # append to history
  setopt APPEND_HISTORY
  # adds commands as they are typed, not at shell exit
  setopt INC_APPEND_HISTORY
  # expire duplicates first
  setopt HIST_EXPIRE_DUPS_FIRST 
  # do not store duplications
  setopt HIST_IGNORE_DUPS
  #ignore duplicates when searching
  setopt HIST_FIND_NO_DUPS
  # removes blank lines from history
  setopt HIST_REDUCE_BLANKS

  alias history='fc -l -i 1'

* case-insensitive globbing, and don't tab-complete all directly :

  setopt NO_CASE_GLOB
  setopt GLOB_COMPLETE

* Allow comments in interactive shells

  setopt interactive_comments
  # or
  set -k
  # or 
  echo "setopt INTERACTIVE_COMMENTS" >> ~/.zshrc
  # or 
  echo "setopt INTERACTIVE_COMMENTS" | sudo tee -a /etc/zshrc

* fix Ctrl-U to delete left

  echo 'bindkey \^U backward-kill-line' >> ~/.zshrc


Also try this? (https://superuser.com/questions/187639/zsh-not-hitting-profile) :

  [[ -e ~/.profile ]] && emulate sh -c 'source ~/.profile'