This must be covered someplace but for the life of me I can't find anything helpful. so: How do you post pics! Thanks in advance and forgive my inability to figure it out.
Just under the box you type in it says
+attachments and other options.
Click that and add your photo/files.
I think you also have to make a certain number of posts in the 3 main areas before you are allowed.
Like said, attach here or imgur.com for the best off-site hosting.