You're not in trouble, I just wanted to make a recommendation. I saw you add an image to the Moustache Island page and it didn't follow the format at all, but looking at the pixel size that accompanied the image, that's a pretty clear calling card of VisualEditor.
New accounts by default have VisualEditor enabled, which absolutely sucks as an editor. It doesn't let you edit galleries, which is nonsensical. So I recommend switching to Source where you can edit the source code of the page directly, including those of Galleries. You can do so by My Preferences > Editing > Preferred editor > Source
You don't have to take my advice, but it just saves time and effort for both of us.
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