You'll get there mate, just remember you don't have to use it fully manual to get GREAT shots.
The sensor in the D750 is an awesome sensor.
Really looking forward to seeing some photos Daniel.
Last problem I was fighting was that the AF wasn't tracking fast moving stuff in video mode, at least I don't think it was, but then I have several videos of me putting the lens cap on because I haven't remembered to turn the camera off first, so whatever that AF problem is, I suspect its root cause is just me!
Enough of hijacking this thread on what is a really neat Stirling Cycle engine, as we can talk camera in emails without detracting so much from your original post!!!