Do you want to insert the picture in your post or to your profile?
For post - at least in the 'quick reply' section - it is the third icon from the right.
For your profile click 'create album' then 'choose picture' followed by clicking the upload blue button on the right of the page and then click 'save changes' under the 'pending pictures' or they will all disappear. That was the bit I didn't see - I assumed 'pending' meant someone was going to have to approve them. Silly me!
Suzan