Indeed, I used Canon 250D and it was very easy, but I aspire for more accuracy and capabilities. So I did the research and found Sony A6400 suitable for me, but the fear was that it was not compatible with good Dragonframe software ?
Go to the Dragonframe website, click on Support, then on Camera Support. Under "choosing the right camera" there is a link to show which cameras are supported. Under Sony Alpha, the 3rd maker down the list, all the supported models are listed. I clicked on the A6400. It looks like it works, here are the setup details: https://www.dragonframe.com/camera-setup/sony_alpha_a6400/
It says the Sony A6400 will work with Dragonframe 4.2.2, but not with 3.7.3 or older.