Not sure if simpler, just different. Differences highlighted in bold red below.

Upload:
Pictures can be stored on other sites but if you have none, you can do it here:
- your pic must be 976.6 KB max.
- go here
- do "post reply"
- scroll down and hit "manage attachments"
- New window appears, hit "browse" and upload your picture.
- click the link appearing in the Manage Attachments window, as pictured:



- this will open a new browser tab; go to that tab an copy the attachment ID (part of the URL that says, for example, "attachmentid=41583")
- "Close this window"
- Above "manage attachments", right click on the image name and do "copy link"
- Into the post window, insert an image and paste the copied url the "attach" tag, using the attachment ID obtained above
- it should look like this: [banana]41583[/banana] (replace "banana" with "attach"; I had to obfuscate it to stop TMO interpreting the tags)
- post.

The result: