My advice for you is to be active in different topics, write good and constructive comments on the topic. For 1.5 months you will reach the rank of Junior Member.
i suggest you set a goal for yourself that you will always make a good constructive post say 3 posts everyday on different topics. you can set alarm to monitor that so whenever it rings then you go back to business and make your posts. by this your activities will rise for you to get your promotion.