It really easy if you have any problems contact me and I will help further.
When making a post if you look at the area between the Post Title and the place I'm currently wrighting there is a square box. This box has a comp disk and image inside it. If you click the button it will open a new box. Simply click the browse button and find the pic on your computer. This will upload it. This way you can post it on your thread.
Hope this helped.