I have referred many members, in private and in threads to a post I wrote to help the first member who asked me how to post pictures in a post. I thought it would get more early readers if I put it here, so here goes.
Go to upload attachment, click, choose file, click add the file, now decide where in your text you want the picture to go, then click place inline. Give it a try. Try the preview button before hitting submit to make sure it looks good.
If you have any questions about what is appropriate to post, please contact any member you trust for help. Also, you can read picture posting guidelines here. viewtopic.php?f=2&t=309