Sign in using your email address and the password you created. Go to "posting", compose....write in a title and whatever else you wish to write and then click on the "insert image" icon at the top of this box, select the picture you wish to post from your computer file and then once it is done uploading you can click on the orange button "publish post" and that should be that. ......Or ask your sister Pam because SHE can do it.
Good Luck!