Add a picture in my website?????????

Today, I tried my level best to add a picture in my blog. But I don't know how this thing works out. I'd love to add an image in my blog. I think it's better to ask my father. He knows more about computer. Does someone need a software programm or something like that to add a picture in a webpage? I have nooooooooo idea.
By the way, I'm all alone now. That doesn't mean that I'm alone in my house. My father and my mother are sleeping tiredly after their night duties. My brother hangs out with his friend in a swimming pool nearby. So, I have nobody whom I can talk to. It's O.K. I will look through the blogs a little, watch T.V, write my diary, read that love story that I haven't completed yet etc, etc.