Hi Gamara!
First, you can always edit a post you've made using this icon
above your post instead of posting after yourself.
Second, I encourage you to use the "Preview Post" button to see if the post appears as you intended and then edit accordingly if it does not.
Third, you can also use the "Upload File Form" next to the Quick Reply box or on the Full Relpy Form to uload an image to share (in this case your intended avatar) which I would then upload to our avatar list.
Or fourth, click on the
icon above my post and send me an e-mail with your image as an attachment and I can upload it for you from that.
Unfortunately, the image you are attempting to share is not at any of the addresses that you are trying to use.
Please let me know if you need further assistance.