Welcome, Vincent. There's a good reason to "hide" behind screen names. I use the same one here and on the VOC, but use a variety of different ones elsewhere.
Given the nature of the internet, if some whacko decides he doesn't like something I wrote, different screen names make it that much harder for them to find and attack me on other sites. It wouldn't necessarily stop the truly obsessed, but it would deter most. Although the people here and on the VOC are friendly, that's not the case everywhere.
My real name was revealed here by someone with bad intentions for doing so, after which I sometimes posted thing that included my real name. I might not have done that otherwise.
As for posting pictures, you have two choices. One is to pay an annual fee to Britbike that allows you to post directly, and the other is to find a Hosting
side for your photographs, and include a link to the photo.
In the former case, you can "Reply" to a post, in which case you will next see a blank screen, or you can "Quote" a post, in which case the full text of the post you are responding to will appear (which you can then edit to include only the relevant information).
At the bottom of the Reply or Quote screen the "Use Full Editor" button pops up a screen with additional options, including an Attachment Manager that lets you add up to five photographs, one at a time. An additional detail is you should have your cursor located where you want the post to appear, and after each one is uploaded you then need to click on the photo in the Attachment Manager to insert the necessary link at that point.
If you use an external Hosting
site, clicking on the icon of a picture will let you enter the URL of the photograph.
Anyway, back to Ariels. I love my Model C, and it has given me a real interest in rigid-framed, girder-forked bikes of that era. Unlike older machines, the Ariel is fast enough, and stops well enough, to hold its own with modern traffic on all but Interstate highways.