Personally I start off with a gathering/deforestation of the local wagon area (or dig zone, if I'm not digging straight down from the wagon) and drive a ramp down to stone to get the beginnings of the rock pots/Nest Boxes/etc started up. While that works and my planters 'finish up' with collecting some local flora I'll usually drive back upwards towards soil if there's any (past a defensive tunnel) and start setting up 2 5x5 Plump Helmet farms... though I may start corn rowing for something different. They get a private seed dump with no bins and a delivery zone right next to them with no barrels. That eventually gets linked to the brewer's stockpiles which uses barrels.
Once those are going (and the rest of my fort is busy digging out the kitchen, starting dorm/dining room, and goose/chicken room) I'll take a quick look at my kitchen and see what seeds or plants we got locally. If possible, I'll brew them for seeds and start up some further brewing plants above ground near the entrance, usually 3x3s because I don't want my Farmer exposed a lot early, he's also my cook and brewer when I start.
Add in a migrant wave or two and I'll have 3 permanent farming grunts. At that point I'll toss in Pig tails in about 35 plots worth (same setup as above) with a dedicated stockpile on the crafting level for pigtails and rope reed. Continue to add in plots (digging out more small rooms so I can keep it straight) whenever I see all farm plots 'filled' and nothing waiting for collection. I usually don't have any spare haulers until the first big migrant wave.
Eventually, with a series of local seed deposits, a main seed storage that feeds those seed deposits, a local dropoff for the plants linked to whatever stockpile(s) they need to go to, I'll end up producing everything I can with 3-4 farmers. I haven't done an undead biome yet so my hunters are usually hacking up meat like it was no tomorrow, so as much flora as possible usually gets shoved through the still. When I get an overload they can start cooking with wine. I've gone so far as to build the farmers local bedrooms at the farms, along with a private dining hall and food storage, so they don't have to travel anywhere. They're not as ecstatic about the decent dining room as everyone else is for the legendary one, but it does save a lot of travel time. They'll eventually get masterwork stuff so it evens out later.