I am no marketing expert, and the people below have given good advice, but if you are struggling to convert people who view your site, you could add a plugin where customers can talk to you if they have questions. I bet you would learn a lot just by talking to the customers directly.
This app is free and allows prospective customers to ask questions like they are talking to a personal shopper:
This app has some free plans but offers text based chat.
I’m sure there are others, as well.