If you want to find a signature campaign maybe you can go to the service section, there are a lot of signature campaign and you can look for that can accept newbie. Or perhaps to ease you look for it you can visit this https://bitcointalk.org/index.php?topic=615953.0. There you can find the signature campaign is easier. But a little advice, I think most signature campaign do not accept newbie. You'd better wait until Full Member and make your quality post to be better, it will be easy for you can be accepted.