There are various sites where you can upload pictures from your computer. I use photobucket.com and it must be easy to use because I'm a complete computer illiterate.
You can set up a free account on photobucket and upload your pictures. I think they have to be JPEG format. Then you click on the IMG code under the picture you want to post and paste it into the message window. I always do the "Preview Post" just to make sure I got it right, then "Submit Reply".
Max, black and white tux, passed on 2005. Speedboat, yellow tabby, went to Rainbow Bridge yesterday. The grey and white beauty, Muffin, still lives with me. Aren't they beautiful