Do you have a sufficiently dimensioned electrical line going up? Usually, there is only a single line for a lamp and at most one socket going up.
Additionally, you need internet in the office, right? There won’t be a network cable in the attic, will there?
How is access supposed to be made? If the attic stairs are open, they will probably be in the way somehow, won’t they?
Everything is illuminated like in a living space, that’s not a problem, we over-dimensioned that upstairs…. Regarding the wiring, you’re right, I think there really is only one socket upstairs. Would it really be too much to use a multi-plug for a monitor, laptop, and possibly a printer? I would have thought one line could still handle that. Internet I have via 5G mobile hotspot up there.
Access will probably unfortunately only be possible through the attic hatch, so I would then just insulate the area there as well. The only other realistic option would be from outside via some kind of spiral staircase (or ladder) and installing a door. Inside, it’s almost impossible to integrate a staircase due to ceiling cooling, unfortunately. But generally, the conversion would bring such relief that I would accept using the attic hatch.
Whether I can get down alone from above is the next good question… I have to try that. Although my wife is actually always home at the moment due to parental leave, later on I would of course need the ability to get down alone.