HELP!!! I'm so confused.

Okay So I I just read the "update" about the 'new' BB codes.
And Iove that we have new ones. I didn't know we had old ones.

Butthe problem is, I don't know how to use them.
New or old.
I just don't get it.
So could some one explain it to me?
Please?

I'm really not much of a computer person, so all this fancy stuff that I would usually do with the click of a button on my word program, I have to use some code for and I don't understand the code thing. I had a friend make a layout for my story last night, because I don't know how to do that either. (which you ALL should read. It's called Living Without His Arms!!!)

thank you.

<3
Kailey