what you have to do (and I know this from personal experience) is click lots, get annoyed, lots swear and curse, question yourself as a man a few times, avatar is what to click in your profile click your name to get there
Hi Trev what you do is: Once logged onto forum click on your name at top right of banner, the black strip under the search box, that should open up your profile page, in there you will find something that says "avatar" click on that and it will ask if you want to upload one, they should be square and around 200 x 200 megapixel in size, search for wherever it is and click on it.