The easiest way to create an album is to click the 'Create Page' link near the top of the screen, choose the 'Album' button and then proceed from there with no HTML involved. You'll see a lot of other object types you can create too, such as routes and so on.
Having created objects you can attach them to other pages using the 'Attach/Detach' link that will appear at the top of your newly constructed pages.
In instances where there's an existing page and you just want to attach an image there'll be a link to do that on the left hand side.
It may be worth drawing your attention to the fairly well hidden but comprehensive FAQ page section on creating and submitting content to SP: http://www.summitpost.org/faq.html#chapter_33
. It should answer most of your questions.
Sounds like you've got a lot you're eager to bring to the table, looking forward to it.