Cameron, you need to downsize your photos to put them on here. Do you have Microsoft Office Picture Manager on your computer. It is easy to do it with that programme. Open the photograph, click on edit pictures, then on compress (bottom right), then choose web pages, then save with a different name, then close the programme and click don't save.
Then open a message on here, click on 'additional options', click on browse to find the photo on your computer, tehn click post. Job done.