Welcome, glad to see that you would like to join in on the fun along with the rest of us on this mail list.
To SUBSCRIBE to the mail list: First, don't let that word subscribe "put you off", it is FREE. Subscribe is only a directive word, it will not cost you any money. DO NOT type any message except the word subscribe in the body of the message.
Use the computer address that you want the mail list to go to. Send from that address as you will be sending to a computer which will automatically use the address from which it receives the directive to send you messages from our friends.
To write to your friends, you will send your messages to CA_RODEO@yahoogroups.com and then everyone who is currently subscribed will receive a copy of what you wrote. You will also receive a copy of what you wrote thru default of the program. However, you must first subscribe to send to the list.