I'm so sorry but they are no available slots for newbies to join a signature campaign. Before yes, some newbies are allowed to join, but now, it's not available. You need to be a jr.member and up before you can join a signature campaign. It is for them to know how active you are. So work it out. Just make constructive and informative posts or threads for you to rank up. This thread is all about signature campaigns https://bitcointalk.org/index.php?topic=2268213.msg22982782#msg22982782 I hope it can help you in your queries. Have a great day ahead!