First thing to ask you, I hope you're not joining the forum because of the contest, secondly, posting an image requires being a jr member rank upward, you're still a newbie, you need more activities and posting together with the minimum merit requirements for a junior member rank to be able to post image.

Do it I will advise you, try and increase on more activities by contributing more on any aspect that you can give your best, since you already had the 1 merit requirement.

After this, you can also learn about posting images

guidelines for posting images
https://bitcointalk.org/index.php?topic=3974517

[Tutorial] How to add image, resize image and make image clickable
https://bitcointalk.org/index.php?topic=2958771