welcome to "Spatopia." It really is great owning and enjoying a hot tub!!
As to posting pictures - you need to upload your photos to one of the many free websites which are designed for that purpose. Then you select the one you want to post here, and copy it's URL. Click on the little picture icon which appears to the left above the smiley emoticons on the "Post Reply" page where you go to post anything. Once you click that button, it gives you this:
img in brackets, then /img also in brackets. You put the URL of your picture in between (it puts the cursor right where you need it for you) and you are good to go.
Here is a shot of the Channel Islands Harbor = I was lucky enough to have a service call just down the street yesterday, and it was such a beautiful day that I stopped and took some pictures.