There are some good tutorials out there for DF. Though I do still think DF is challenging, I think its difficulty is way overstated.
I find RTS games harder.
In all honesty, DF isn't hard at all. Like just getting food drink and living quarters down and your fort will live a couple years or more probably. Especially now when the usual awful stuff like goblins actually have to travel to the fort to attack it, so you aren't attacked every year.
It's just the sin of a (nearly) one-man game project having ugly, spartan UI, because a lot of programmers aren't visual UI people (and that's okay). From the Depths suffers the same way, it has a bizarre and ugly UI but actually building a functional craft or gun isn't that hard. Once you learn how the game tells you information and how to tell it to do basic tasks you're 75% of the way to doing anything in dwarf fort.
Honestly the biggest roadblocks are assigning jobs to dwarfs without an external spreadsheet program like dwarf therapist (especially with big big migrant waves), or setting up a proper, useful military that actually trains correctly.
Another issue, at least that I had is that, outside of outright announcing when megabeasts, seiges, or werebeasts spawn on the map, the game barely alerts you if the dwarfs are under attack, for example from hostile wildlife. I've literally had an ogre just walk into the fort and go to poundtown and I didn't know until I was actually looking at the fort interior and seeing the unwelcome guest, or the game not really inform me that the cavern river designated for fishing is now full of cave alligators, until I actually view the combat record or for whatever reason idlily watch my fishermen.