All I can say is that there have been a few times that I've come across Eckert's sources and that those same conversations are found in his primary sources. Especially read the work of historians that are not only good at their profession but who write well. Look how they use words, how they put them together. It's a good source of inspiration. And keep writing.
Writing is a skill that has to be practiced.
And do more than one type of writing, for the experience. I've mentioned that I've written a novel and I found that that helped my other writing as well. One reason that many historians don't have more of an audience is that they may be very good at reaching conclusions but that by itself isn't enough. They have to learn the craft of writing also.