Oh snoozle how awful for SIL and how awful for you - but you weren't to know. You came here to rant and what goes on MN stays on MN!
So, spent ages reading everyone's posts. Can't possibly name check all but wanted to add my bits & bobs for what they are worth.
For 1st timers, keep in mind that whilst it's great to have lots of info so you can choose what is right for you, every baby/parent is different and what works for one person won't work for another. Trust yourself to work it out in the end. The first few weeks are bittersweet as your baby is here but you have no clue what you are doing and (shh) may not even love it very much.
I remember looking at DD at 6 weeks and saying 'I don't want any harm to come to her but I don't love her'. By about 8/9 weeks I was totally in love and things started getting easier.
Anyhoo, so breastfeeding - it's one of the best things you can do for your baby but also remember formula is not poison. It is perfectly safe and fine for babies. Yes, the marketing techniques are awful in developing countries but, tbh, your baby comes first. 95% of all mums in the UK could breastfeed with the right support. Sadly the support is lacking for most of us and some will not continue past a few weeks through sheer lack of support resources.
if this is you, do not beat yourself up.
My milk never came in (I was one of the 5% who physically can't) and it broke my heart but I discovered baby led weaning which was a real healer (worry about that later though!).
I'm hoping this time to bf though as I'm not on bp tablets this pg, which caused my milk to not arrive.
We costed ready made cartons of SMA against powder and it worked out about £1 extra a week for ready made. So we never bought powder and bought large cartons of SMA milk. DD thrived and (touch wood) has only ever had colds/sore throats and nothing else in her 3 years.
Someone mentioned a pillow in the pram on their list - don't. Babies don't need pillows until they are at least 1. DD didn't have one till she was 18m and moved out of her cot into a bed.
Pram suits are fab in the cold weather IMO and we found one with poppers. Who cares if it's pink/purple. If this one is a boy, he'll be in it too.
I think all babies are different. Eg DD was hot, so inside the house she often only had a babygro on and I never put her in a hat indoors. Hospitals are very hot, so didn't have one for her there either. Going out it was layers, mittens and a hat. She wore socks until she was 16m old and walked outside for the first time - pram shoes are a con IMO.
We have a lovely organic swaddle robe that we'll use again from Jojo Maman Bebe. DD went in it till she went into her sleeping bag at about 10lbs.
DP and I slept with her cellular blanket and swaddle robe from about 36 weeks so they smelt of us when she was wrapped up.
Bathing - we used a newborn support in the bath or used a baby bath downstairs if we couldn't be arsed to come upstairs (DD stayed with us in her moses basket till we went to bed until she was about 4 months, so was just carried around everywhere with us). We did have a change table in her bedroom or changed her on the settee as I have back problems. I'm dreading going back to nappies as DD has been out of them since about 25months and I've forgotten how many they go through every day!
Phew - loooong post. Happy weekends! PMA i finish work 16 weeks on Thursday!