For the rank you have I suggest don't focus to find signature campaign.
Just focus on the post that you make useful and informative so that your rank can quickly increase. You need to collect 10 merit to be able joining the signature campaign.
I think this is the best suggestion a newbie can get at the moment from this forum because most campaign paying in Btc lately don't have space for such rank. So he can as well look for altcoin while he acquire some merits.