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If you really consider you need to rush posting your image, then take the Copper Membership road as explained above in this same thread. Otherwise, you need to become a Jr. Member for which you do not yet qualify (you need an Activity of at least 30, and at least 1 Merit). The Activity is dead easy to get, and I guess you know how it goes by now.
The 1 Merit is not too tough if you really give it a go by posting decent content. Anyone with sMerits (sendable merits) can award you one. Potentially, there are thousands of people in disposition on the forum, but you need to post more than the regular on-liner to postulate at all to being merited in general.
Thank you for your suggestion. I am not in a hurry to post images, but sometimes I need to insert some images in the post to make it look more interesting.
Of course I understand what Merit is. I am working on it. I need to raise the activity to 30 points and think about how to publish a quality post.