Scruff,
Where do you need to post? In this forum?
If so, use a 3rd-party free image-hosting website such as Imgur. Sign up, upload your images, and when you need to post images (on guitar forums), simply click on the thumbnail image, and then select 'Direct Link' > Copy. If the image doesn't immediately pop up when you click on the thumbnail, simply refresh your browser window by clicking the forward-direction circular icon in your URL bar.
Come back to this forum, and select the small icon at the top of your posting window (where Bold, Italics, Underline, etc, reside). Look over to where the small smiley icon, is, then one more, where the image icon is. Click on the image icon. A new screen will open. Paste your Imgur URL into this line. Then just follow the prompt.
Be advised, however, that you're required a minimum of 10 posts on this forum before you can post images.
Thx for reading, best wishes to you...