I did not know how to dig into the cliff-face
Haha, I remember this was a common problem, people would post about it a lot. "what cliff face? I cant explore any further to the left, how do you find it" and things like this.
Man, I don't know how I figured it out, I think it helped that "d" was context sensitive so if you try to "d"esignate in the black area behind the irregular grey line, it defaults to "dig". And if you "d"esignate elsewhere it defaults to "chop trees" or "gather plants" or whatever it is. So I just sort of intuitively knew, the first time I started experimenting with the menu commands.
From there, digging was easy. I had brought a skilled miner and woodcutter, so lucked out that those labors were enabled. And I started digging out some rooms and stuff. Dutifully storing my stone in a stockpile outside, because it seems like thats what you should do: clear out your tailings.
I lost like two or three when the cave river flooded when I first breached it. Someone else was out hunting (or maybe fishing?) and angered some pack of animals who came back to kill the remaining dwarfs.
I think I lost the second one to an attack from cavern creatures, or an ambush from river creatures or something like that. One fell to an actual siege, another to starvation due to a poor understanding of farming and brewing.
That was the first four or so, most of what I lost after that was due to quitting.
I almost lost a major 200+ dwarf fort to starvation once. It was going so well, I forgot to re-wet and re-designate the farms after they dried during the winter. By the time I noticed anything was wrong, someone had died of starvation and half the fort was hunting for vermin.
I was only able to save it by designating all the booze and remaining seeds for cooking, and butchering all of our butcherable animals. I named that event Gingkunakath, which roughly translates to kitten-winter. Or would, if there was a dwarf word for kitten. I guess the dwarf word for kitten might just be igril.