B2C Market Research

Hey guys. So trying to build a product to dolve a problem in the current dating industry. I have talked to a bunch of people regarding this but I feel its too small a sample size. Any ideas on how I can gather mass data by sending questionairres online or something. Or any workflow. Target audience would be 25-35 , 18 -25, 35 -45 priority in descending order. Need some help thankss.