Re posting photos, there is a tutorial posted as a sticky in the Forum Technical Support forum. However I think I can make it simpler.
The biggest hurdle is that you have to be using a photo that is online somewhere. In other words, this site does not host your photo. The photo has to be externally hosted. If you are using a photo you have taken, then you need to put them onto some online photo site. I use picasaweb.google.com. Others use photobucket.com, flikr.com, etc. I can't speak to the others, but I use Picasa the same way as I use a photo that is on ebay or any other website. Namely, I right click on the photo, and select Copy Image URL. That is 90% of the battle.
Then when composing a post here, click on the icon that looks like a mountain and sun. A box will come up, in which you paste the URL of the photo you want to post. Secondarily, you set the dimensions of the photo. Set it to 640 wide, or less.
That's it. You are allowed to practice it at the Forum Tech Support forum, if you are so inclined. I would first practice with a photo that is already online. Once you see how easy that is, then you can proceed to find yourself a place to put your photos online.