Which car seat are you getting zyla? Does it fit the Isofix? We got a stupid combination (cabriofix and Isofix) and I'm dreading the next stage as I know we'll probably need to buy whole new kit! Had to move B up in the car seat today as he's too big for the cushion and first straps - he's only 9 weeks old for god's sake!
purple and deeply - we've started a routine with B since about 3 weeks old. Nothing complicated - we do clear night/day so during day I keep music/TV on and have curtains open, from 6:30 I have all curtains/shades closed and speak quietly to him. At night feeds I don't speak to him at all (unless he's upset of course to soothe him). We started bathing him at 4 weeks and do that every night now at 6:30pm. Depending on whether he's hungry or not beforehand I feed him before or after bath. If before then he gets a bit more after bath to make him sleepy. The bedroom is made dark with just a nightlight on and I cuddle him and tell him a story (usually something daft at the moment that I make up off the top of my head as he's too little for a proper book story - he's usually too tired for that). He's normally dropped off by that point so I put him in crib with white noise on and Ewan the dream sheep.
We've only just started putting him upstairs from bath to when I go to bed, just because he wasn't sleeping well in lounge with us in the evening. Previously we had him in the carry cot in the lounge from bath time until we went to bed but he just kept waking up. He sleeps better upstairs and we have the monitor on and I check on him regularly.
It is pretty early to have started a routine - but he seems to be falling into it OK. He is very very tired though by evening so he starts crying sometimes just from tiredness during bath and feed. I keep the bath very short so its nice and pleasant for him rather than upsetting and if he wants feeding before the bath then I just go ahead and feed him as he's only little still and feeds on demand.
In terms of your daily routine - definitely definitely try to chill out and just let him lead. My mistake at the start was to try to control it all and I was stressing myself and him out. If we're going somewhere I usually try to boob him before we go, but if he's asleep or not hungry then I just do it when I get wherever I'm going. He still feeds a lot during the day - there's no set times really, although it roughly follows the 7, 10, 1, 4 pattern. I think the best thing I learned was just to go with it and remember that I've got nowhere particularly to be and that he's a newborn for only a short amount of time. So if he's cluster feeding then just get comfy and have the remotes to hand. If he wants cuddles then I cuddle him and let him go to sleep on me if he wants.