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I asked in another thread about what was the biggest hurdle people faced when starting. For me, it wasn't about polar alignment, or NINA, or ASCOM, or or focal lengths, mounts, etc.
It was what cable went where.
I read books, magazine articles, watched YouTube videos and no-one actually said anything like "You plug your guide camera in here, you connect the ST4 port of the mount to here..." or anything remotely similar. There was a bit on cable management, but very little on what the basic cables did, where they should be plugged in, or why. I (eventually) figured it out through a combination of freeze-framing some videos to try and see what went where - not easy with the spaghetti junction of cables on some rigs - and through a series of failures when I tried connecting things up and it didn't work.
I've been an observer for some time before I tried my hand at astrophotography, and I thought I was familiar with the basics. But sometimes, things aren't basic enough! While I think I'm pretty squared away with it all now, a video on why the cable from "X" has to go to "Y" would be informative.
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