This is a remarkable sefer. I bought both recently. I would encourage you to keep producing more and more of this.
I would say that you need to reach out to Eichlers, Z Berman, and the like. I would also suggest getting copies to people like R’ Yair Hoffman, Ben Rothke, and using facebook to promote it. I’d also consider an ad in the Yated or Hamodia.
Lastly, if you set up a fundraising page, it would help and I would donate.