While the hustle is admirable, I think you could use more creativity on the outreach plan. Doctors are likely one of the most harried professions in the world. Cold emails to these folks are not going to work well.

You have to find a way to network.

Look at how pharma reps do it. Attractive people, coming into the office and bring lunch.

Where can you put yourself in a spot to meet and talk to a high percentage of doctors. My first thought is a golf course. Is there a way in that way?

Do you volunteer at a hospital on weekends?

Another tip is for anyone you talk to, ask for introductions. Who else has this problem?? I work in healthcare (not a doctor). Not sure if I can help, but happy to chat if you dm me.