This gist contains a simple script to initialize a session with pre-defined windows on tmux

gistfile1.txt

#!/bin/bash

# Set Session Name
SESSION="Work"
SESSIONEXISTS=$(tmux list-sessions | grep $SESSION)

# Only create tmux session if it doesn't already exist
if [ "$SESSIONEXISTS" = "" ]
then
    # Start New Session with our name
    tmux new-session -d -s $SESSION

    # Name first Pane and start zsh
    tmux rename-window -t $SESSION:1 'Main'
    tmux send-keys -t 'Main' 'clear' C-m

    # Create and setup first pane
    tmux new-window -t $SESSION:2 -n 'Second'
    tmux send-keys -t 'Second' 'ls -l' C-m

    # setup Writing window
    tmux new-window -t $SESSION:3 -n 'Third'
    tmux send-keys -t 'Third' "nvim" C-m
fi

# Attach Session, on the Main window
# My tmux is configured to start from 1 (default is 0)
tmux attach-session -t $SESSION:1