D.C.
I loved (still do) the book "1-2-3 Magic". I think the author is Phelan.
What I did for my young child and a first time-out was to sit beside him. I modeled being quiet, reminding him each time he spoke up that Timeout means no questions now and no talking. I had to time this just right so that there was another adult in the house to watch the other boy or boys! Or just told the other boys to go play in their room.
As I learned from the book that has already been mentioned is that "timeout" doesn't mean, or doesn't have to mean, sitting in a corner or other boring place for five minutes. I have been creative and put a nerf ball in "timeout" because tossing it in the house came too close to knocking over some breakable items. When it came out of timeout, the kids were reminded of the rules that go with playing with it responsibly (safely) in the house, like in their bedroom.
One other thing I learned about timeouts, maybe because my boys have some OCD, was to give a _specific_ time for the timeout. I could always add another X number of minutes if time was up and they had not stopped crying or fussing or what have you. Letting them have a timer to watch or to listen for, was a great thing to do. I couldn't leave it where they could reach it and maybe reset it or shorten the time on it!
I actually found very little need for timeouts. Redirection fit us a lot better.
In his book, Phelan talks about waiting until the age of two. And after the age of about 12, these timeouts have to be redesigned for the tween, pre-teen, and teens. My teenager hasn't forgotten those timeouts but loss of privileges works a lot better for a teenager. LOL
It will be a huge advantage to you to read the 1-2-3 Magic book or something similar now.
Good luck!