As for now signature campaign did not accepting newbie rank to join
And my advice to you rank up first to junior mem many signature campaign looking and accepting a junior member on sig campaign
There are some airdrop signature campaigns as well as altcoin signature campaigns where newbies are accepted. I would suggest all the newbies who want to participate in signature campaigns, start with altcoin section. They don't ask for more posts and gives you freedom of learning.
But only one or two of these campaigns pay in Bitcoins. Others pay in various altcoins, and some of these new altcoins can be worthless after a few months. Still there are two campaigns which I would like to recommend: DeepOnion, and Bitsend.