High quality signature campaigns are usually on the service board because they directly make payments every week using BTC or ETH. But usually to participate in it you must have enough rank, at least Full Member.
So, the first step you have to do now is focus on improving the quality of your account posts, then if you feel you have enough quality accounts, then try to participate the signature campaign. And don't forget to read the guide here https://bitcointalk.org/index.php?topic=1684035.0