Getting past step 1 of getting users. I will not promote

Just a general question/advice. I have attempted 10+ ideas in the market to never even get one sign up or contact. The key problem is my sales strategy, I utilise FB and FB ads, with a very limited budget, my max is hit and then I can only post organically to draw attention. Any ideas of how to get past this first big hurdle that isn’t the typical of invite friends, post daily etc etc