Here you can see how to connect and access the IRC using some random nickname and then enumerate some interesting info.
#Connection with random nickname
USER ran213eqdw123 0 * ran213eqdw123
NICK ran213eqdw123
#If a PING :<random> is responded you need to send
#PONG :<received random>
VERSION
HELP
INFO
LINKS
HELPOP USERCMDS
HELPOP OPERCMDS
OPERATOR CAPA
ADMIN #Admin info
USERS #Current number of users
TIME #Server's time
STATS a #Only operators should be able to run this
NAMES #List channel names and usernames inside of each channel
LIST #List channel names along with channel banner
WHOIS <USERNAME> #WHOIS a username
USERHOST <USERNAME> #If available, get hostname of a user
USERIP <USERNAME> #If available, get ip of a user
JOIN <CHANNEL_NAME> #Connect to a channel
#Operator creds Brute-Force
OPER <USERNAME> <PASSWORD>