I feel you. I have the same struggles with my photography - I've been winning awards and every art show I get I get people coming up to me and saying how one of  my pieces was their favourite, even won a people's choice award at a big show recently, but can't seem to translate that in to sales. I don't spend much time marketing myself and have never been good at it. I just hope my work continues to speak to people and they enjoy it and hopefully with time it grows. 
If you figure out any secrets, let me know 😂  

 The secret is to continue cultivating your passion and hope for a little luck.