Here is my story,from other platform,but here i have the same problem.I gave proposal to buyer to cooperation.He unsered its too hard you cant do it.He concluded that from my history of selling services.Only because of he opened massages i could answer him.And send his edited image for free.Reaction was like wwooww fantastik exelent and said i better hired you than other freelancer.And i still work with him.And there are many jobs that i could do easily,but buyers just dont trust sellers without history or rating.Its so stresfull.