Is there a good resource or tutorial on how one would prepare and execute one of these hikes? I would love to try a multi-day hike, but I have zero experience camping / backpacking. Where to get started? Are there hikes for complete novices that e.g. go from town to town with places to stay overnight?
So, hut supported, you could try the Iceland trail, the Kungsleden in Sweden is moderate difficulty and the huts are wonderful, the huts in the U.S. on segments of the Appalachian trail are quite nice (and they even cook you dinner at some!) and there are a few others you can search for. Then once you've picked a specific hike, quite a few people write about their experiences on that particular trail and you can hone in on the specific equipment you'll need to bring.
My biggest piece of advice: be absolutely ruthless about the stuff you decide to bring so you can keep your pack as light as possible for that first multi-day hike. A bunch of extra clothes? No. The very low probability emergency situation that your hut won't have working gas so you have to bring your own stove? No. etc. etc.