Buying a senior rank account is a good option to start joining signature campaign early but that is not the first thing that you need to think about. First you need to have some knowledge about bitcoin to be able to get some ideas and also be able to share your thoughts in most of the topic/threads out there. Second you need to make constructive post not just like one word or very short sentence. Third be active on this forum and the thing that you need to remember everyday and especially if you joined signature campaign is not to spam because it will cause for you to be ban/kicked out from the campaign.