The above photos are all from multi family river skiing here on the North Shore of Lake Superior. Adults and kids.
We had a wide variety of gear: Altai Hok/BD Trekkers , 90mm waisted Fat Nordic skis with 3 pin tele bindings, Voile Objective BC skis with AT bindings , 60mm Nordic skis with NNN-BC bindings, the list goes on.
Pros and cons to each system. The perfect system doesn’t exist.
I agree, it is confusing to a new person. Sorry. It’s just the way it is.
The big thing you need to be clear on is:
How much flat is there, and how much tight turning?
On open flat terrain like frozen lakes, narrow, metal edged Nordic skis (almost like track Nordic skis) with NNN -BC bindings and boots are best. Fastest and most comfy. Also the cheapest option. The boots suck for winter overnights though, as they do not have removable liners. Wear vapor barrier socks and use gaiters. They also don’t climb ice well, due to flexible soles. Firm snow climbing they could take a semi auto crampon.
For Logging roads in hills or mountains, or frozen rivers like the ones above, you need a beefier boot and binding to control the skis. 3 pin + low plastic boots are nice for this, and allow you to keep the liners warm in your sleeping bag (and you can use non absorbing Palau/Intuition closed cell foam liners).
Use Fat Nordic skis if more flat, or Voile BC fischscale alpine if more turning and up and down.
If you are trying to go on hiking trails and other twisty, tree covered terrain, go alpine skis with Fishscales (Voile BC models), and either a low plastic tele boot and binding, or light AT boot and binding.
AT is lighter and better control and climbs easy ice as well as mountaineering boots, tele will have better kick and glide.
Once you decide what gear you will use, you will know where to go for lessons: Nordic center if you get nordic skis or alpine lift served hill of getting alpine skis (with either tele or AT bindings).