Interesting a newbie account asking about signature campaign, you need to be a Jr.member to participate in most signature campaign, I will advice you to focus on building up your account rank before discussing a signature campaigns. Newsletter and likes of social media campaign you can start with
I there is no harm on someone seeking information about something that might be of help to him in future, we are here to help one another too and share ideas, he said that he will need the information for when he switches over to Jr. Member, not necessarily for now. Moving forward, its not very easy to pic signature campaigns as some of the most legitimate looking ones turn out t be scams, you can however turn your focus on the campaign managers, managers with good reputation tend to manage good campaigns, find them and follow them, they are likely to lead you to a good signature campaign, You cn lso look at the number of people participating, good campaigns tend to attract a number of bounty hunters.