you are not eligible in bounty campaigns first you develop your skills in Crypto platform then automatically you are getting some idea in bounty and signature campaigns. Because now merit system is major role in the  position so try to increase your post quality then only you are getting merits. This is the only way to increase your position after that you are eligible in bounty campaign. The minimum qualifying rank is jr.member and some social media campaigns are accepting all the users but it depends on your friends and followers.