# First open irssi from terminal:
irssi

# From there, connect to the libera chat server:

/connect irc.us.libera.chat

# And reidentify as your username

/nick <username>

# And register with nickserv if you haven't already,

/msg NickServ REGISTER YourPassword youremail@example.com

# Otherwise simply identify NickServ of your name/password

/msg NickServ IDENTIFY z3rOR0ne YourPassword

# Finally join the channel you wish to partake in:

/join channel

# Some common commands:
CTRL + n (navigate to previous window)
CTRL + p (navigate to next window)

# Show all users in current channel
/names

# Clear the console
/clear

# Quit Irssi
/quit