Hello AtymmefSits. First you must join the community. You can't participate until you join.
There is no cost involved and it's a great community. Once you become a member and want to share a photo you only have to open a menu on your post header. There is an insert photo option there. Simply add the URL to the photo in question and it will be inserted into your message. I hope this is what you were asking. If not, please restate your question with a bit more detail.