Thanks for your thoughts, guys. The fact that I'm getting a recognisable image suggests that everything is working, it's most likely my expectations and lack of experience that are the problem. You've reassured me that I'm on the right track. I've watched many youtube vids about NINA, which is the only reason I managed to reach this point.
The controls all appear to be working ok so far, so at this stage I won't panic! The main thing for now is to become familiar with the software before venturing out into the night (not that I've got any choice, the weather hasn't been cooperating for a long time). Many things these days have a steep learning curve, but this one is near vertical!
