Welcome to the forum!
In the Profiles Menu add the "BB Code" for images to your signature.
For images the BB Code is [img][/img].
Enter the complete URL for your picture in between the "[img][/img]".
All the BB Codes can be found in the link at the bottom of the Quick Reply box at the bottom of each forum page.
One other thing, please downsize your picture to fit in the signature block so we can see the whole picture of what you are posting.
I hope this makes sense to you.
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Ken and Marilyn, 2010 CF30SK, 2003 F250 V10 www.runnerduck.com