My order is a slight bit different
Embark on swamp/forest, all flat with a stream/brook in a corner.
Find center, dig 4x4 area, staircase in each corner straight down. Wall up cavern till later
Hit magma.
Pump magma to sand layer while setting up farms.
Set up the glass furnances and put plump helmets on loop.
Have my two glass makers get to work making glass, any immigrants with glass making gets new glass furnances, if they have a good skill (Doctor, armor/weapon smith, anything my starting 7 had so they can go 1 job each) get hauling on and their skill left. Everyone else gets hauling and masonry. I build my 64x64 castle into the heavens.
6,829 green glass blocks as of yet. 95 dwarves, whole fort is 5 levels high and if roofed over. :3
My only defence being cage traps filled with green glass cages. when the seige came I squashed half with the bridge (I know, shame) and caught the rest. 27 gobbos and 2 elves ( Turns out when I go to mark them to be traded back to the elves, they always escape, so I put them in my mayors room) caught.
The only military I have is a carpenter and (The only one I got) peasant I've taken to calling armok. Both axedwarves decked in steel. When the ettin came armok got his hand smashed open by being punched in it, then fainted out of consciousness while the ettin wasn't able to do anything else. (He had steel gauntlets btw) Then the carpenter came and chopped off both of it's head in the first two swings of battle. I've taken the liberty of renaming both.