Welcome to the foamie side of things!
Sounds like a great plan with lots of motivation.
I'm sure you have read already, but it bears repeating just in case you hadn't, you may find it difficult to share a mattress between house and TD. Many people report having trouble wrangling the foam mattresses in or out once they have let them out of their compressed shipping state. So either plan on nice big side doors, or build a trap door access from under the galley counter (like some people do for inner spring mattresses).
For pictures, I like to use the gallery space provided with your membership. That way your pics will always be associated with the forum and there will never be a problem with broken links.
While logged in, select the "Gallery" button on the right side of the header up there ^. A little way down that page you will see your personal album. Click that and it becomes pretty obvious how to load pics. There is a size limit on them; IIRC it is 800 x 600, so I just set my camera at that resolution (whatever it is) to avoid having to resize.
I like to label and load my pics with numerical prefixes in the order that I intend to post them. That way when I progress thru the individual picture url screens I don't have to hunt back and forth. When composing a post the way I like to do it is have the pics all loaded up and my gallery open. For big epic posts I will work off line in Word so as not to get booted out and lose my work. Select the first pic and double click to get to the single pic view screen. Copy the "Image-URL Code" under the pic and paste that into your composition. If composing here on the forums you can use the "Img" button to bracket the image url with the [img]your picture url code here[/img ] code (no spaces... I have left a space before the last bracket so that the code will show here). Highlight the image url first, or hit the Img tags first then paste it in the middle of the [img]tags here{/img ]. When working in Word, I just type out the img tags.
So here is a trick I have learned; by having my pictures in order, I can actually copy that whole img code picture url line, paste that in for the next image, and only have to bump the last number of the url up by one to equal the next picture.
If that doesn't make sense, select the "Forum Problems" pull down at the top header and select "Help with Photos".
If you use the "Gallery" button in the composition screen, or the "Image BBCode" under the individual pic, your image will come into the post as a smaller clickable image that enlarges to a separate screen. (Not my preference.)
One last thing, IMO it is annoying when the images land all over the page or at the end of a line of text. If you put the img code on its own line it will appear better and read easier in the post.
Again, welcome, and I hope this helps more than it confuses.
