QUESTION: I tried to add a picture, following the steps from tutorial link but I was not success. I need help.
A: Do you have any information about the picture you were trying to add? Is it already uploaded, so you have a web address for it? Pictures must have been uploaded to the web before you can add them
Here is a great tutorial on images and media
It is easiest to use copyright-free, open use images. There are millions so you should be able to find something you want to use.
This is the web address for one of the pictures in the Picture tutorial
This is the web address for a diagram that I uploaded
This tutorial is probably way more information than you need, but if anyone really wants to know everything about pictures in wiki pages…