Hey man I think there are no more signature campaigns that accepts newbies nowadays. On my 5 months in this forum, I have only seen one signature campaigns that recruits Newbie ranking users, and that is the WhyFuture signature campaign, sadly I think they are no longer accepting applicants or the campaign has ended. Just focus on ranking up your account first, then you can start searching for signature campaigns when you become Jr. Member. Because there are some signature campaigns which already accepts jr. member applicants.
I agree. There's no need for you to rush things. You're still a newbie you need to calm down. You still need to learn how things works here. Focus on ranking up your account, that is the first thing you need to do if you're itching to join a signature campaign but for now with your current rank, newbie, i advice you to explore this forum and learn things, with that if you're account ranked up into jr. Member you will not have hard time understanding how things work here. You will not ask shallow things anymore for example what is ICO, what is token, what is op and etc.