Select Browse your computer and find the picture file.
It should then say "You're uploading 1 image"
Click "Start Upload"
It will then upload the photo.
Once uploaded, it will have some links on the right side of the screen. Look for one that looks like this: {img}imgur.com/JSDF124{/img} and then copy and paste that here.
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and of course you figured it out before I could submit this haha.