You will see the following page.
You will have several options for finding the picture you want to add. I suggest you play around with this area and get familiar with all of the options. The picture I want to put on the page is on my computer so I will choose to upload it from my computer.
To do this I click "choose files" and a box will come up form my computer. I will choose the picture and click open.
I will be taken to this screen. "Click insert into post"
You will see your picture appear in your post above your text.
Now come all the cool parts :)
Click on this picture and you will see a pencil in the upper left corner. You will want to click on that
When you click on that pencil you will be taken to the following screen
This screen is where you can do all the cool things . lets go down the list and take a look at a few.
Caption:
You can write a caption here and click update and that will border the picture and display what you write in the box under the picture
Example: