It's important that you click on the add reply button circled in red below and wait for the window to open before you can add pictures.
When you click on the add reply button, a window that looks like this should open.
If your your window does not open with icons as shown, scroll down to the next pos in this thread and reset your preferences as shown there.
Once the window opens fully you need to click on the insert image icon. It's the one with mountain and sun.
Clicking on this Icon will open the photo album tool bar.
From here you can click on the blue create album button. Or just click on one of the albums you have that will be represented as the first picture in the album. Above I have two albums Avatars and Double D. For this turotial I double clicked on Double D and it opened the Album like this
Click on the blue upload button and the upload tool bar will open like this.
Click on the browse button and find where your picture is located on your computer and select the picture to be uploaded. Once selected, the upload will automatically start. When done if you want to add another picture click add more. If you are done...well click done.
When you want to add a picture to a post, just type your post and when you are ready to add a picture, hit the carriage return or enter button twice to
put your picture on a new line and click on the picture in your open album you want to add and the picture will appear in your post. Hit carriage return
twice and resume typing.