Re: Hi and greetings from Oklahoma
One:upload your image into an online gallery. They sponsor one on this site but you can also use services like flikr, or smugmug. ONce hosted you need to find the link to the image that end with the image extension which should be .jpg. Then in your post you can paste this link in using the image icon which is the yellow box with the mountains and sun in the editor. This will embed the image into your post. This is usually the preferred method y most members.
Method 2 Attachement. using the paperclip attachment icon you can upload your file as an attachment. note there are size restrictions for the file being uploaded which may require to scale your image size...be sure to scale only a copy and preserve your original.