When you upload to Facebook, your pictures are automatically hosted by CDN.net. If you do not like direct upload, or prefer to choose your own hosting site, Facebook does offer large "previews" of images hosted by Flickr and a few other sites. Otherwise, I really like using Photobucket — no particular reason.
You can't link the IMG URL to actually show up photos like it would on forums for most hosting sites, but Flickr seems to be the exception.
As far as taking indoor photos, I usually take them beside an opened window on a sunny day — not necessarily direct light, though. I hate taking indoor photos, unless I have additional lighting, so I tend to avoid it unless just for shi**s and giggles. Outside photos, I've learned, is not exactly just taking them outside and snapping a photo, either. Try shooting for around 12 PM in the evening. If the shadows are long, the scales on the skinks are very defined — it ruins that "shiny" look that looks appealing. If the sun is not directly above, face the skink opposite of the sun. Meaning the skink is in view of the sun, but the sun is behind you. I think that makes sense? It is kind of hard to explain it, but location of the sun and positioning of the skink in relation to the sun are important factors to get decent photos outside in my experience. I'm not an expert photographer, but I have taken thousands of photos of my skinks over the years. :-)