Yeah ;
I too wish I knew (or remembered) half of what I know now, back when I was a young pup, eager but clueless
.
That's the nature of the beast, some learn as they go along, others refuse to learn anything they don't currently know .
I crave knowledge .
Moving the fan up should be dead easy .
Maybe door jamb contact switches for the alarm ? .
No need to make thinks complicated .
Courtesy lamp switches work well and junkyards are full of them in various types, sizes and so on .