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
That is right because that is the first thing to do so that it will be able to join any kind of bounty campaign and through research you can choose the right and exact bounties for you. Aside from that to rank the account is the hardest part for now but to join bounties is easy way to go.