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You could try to make a bit more deeper posts, don't be shy if you are not skillful with english, but try to write more about you, and things that you like, maybe posts some daily photos, if you look at what others are doing too succeed you'll see that is like just wright about their daily things, life dreams, hobbies and things like that, people will probably not vote up a post with just a image without context.
good luck ^^