Dairy Sheep Questions

I got three dairy lambs this spring; one ramling and two ewelings. Now I have three ewelings (I guess they're all ewelings still... the seller didn't know when the original girls were born). The ramling seeded the littlest eweling and maybe (hopefully) got the other ewe pregnant as well before he went bonkers and ended up in freezer camp. He was huge. I had no idea he was gonna get that big. (Okay, you can laugh now...) 🤦‍♀️ I think they are polled East Freesian/LaCaune cross (sorry about the spelling), but the seller wasn't sure about the mix. I was fortunate to find dairy stock around here at all so I wasn't about to make any complaints. Besides, they're all nice, healthy gals and the ram has contributed significantly to filling up our freezers.

The baby (Sugar Plum, 'cause that just seemed to be her name) was born Dec 29th. How long should I wait before sharing some of that milk? I was thinking a couple of weeks, but that's just a guess on my part.

I've been giving both of them alfalfa/grass (~50:50) hay since SP made her appearance. (Before that, they'd been grazing a mixed grass/alfalfa round bale most of the days, with a rack-full for when they're stalled. They share a stall, so... Also an extra ration of all-stock sweet mixed grains. That's a Folgers canister twice a day for the two ladies to share. Chickens take some of that... prolly a considerable quantity of "some". The sheep don't seem desperate to get at it, so I'm assuming they're getting plenty. They also have a protein block and of course, fresh non-frozen water. Should I be giving them more feed, or maybe less? Different?

I have materials to build a milking stand and it won't take too long, but what with the bomb-cyclone winter blast event and the garage stuffed with vehicles and feed and all, I haven't started on it yet. Now that the ordinary cold doesn't seem so bad, I'd like to get that built asap. The ones I've seen on Youtube just have a stanchion at the end of the rectangular platform, with a food dish. The ewe hops up and goes to her munchies and you milk her. Would it be better to have side rails? A ramp to ascend? Am I over-thinking this? Can I use this platform to shear them as well? (They came freshly shorn, so I haven't had the shearing experience yet.)

Okay... in fewer words:
1. Am I feeding them properly?
2. When can/should I start milking (lamb-sharing?) I don't want/intend to separate them (esp at night), but I wonder whether Ewekalalie will reach her production capacity If I don't place some demand on it fairly early in the game. 🤷‍♀️
3. Will a platform with a stanchion be sufficient for shearing, hoof trimming, etc.?
4. Thanks so much for any wisdom ya'll can share with me!