Rather problematically my first had very different tastes to my second.
first used a hideously patterned bouncer bought from Argos for £13 as an emergency purchase. She loved it. Second I engaged in literally months of complex buying behaviour getting the bjorn for the right price - she was in it twice and wailed the whole time.
first wouldn’t tolerate BFing so we were all about the bottles and the formula devices. Second latched like you see on that film so it was nipple cream (lansinoh all the way!!), slings.
the things they had in common were:
muslins. All of them. In all the sizes. I used them for EVERYTHING. I treated myself to beautiful rainbow coloured ones for number two as I knew how handy they were. Get all the Muslins
swaddleme wrap. I know other babies hate being swaddled but mine LOVED it. Both of them would visibly relax when I did the last Velcro. It might be worth borrowing one if you fancy trying it. We used cellular blankets (again - get a few) for swaddling until they were big enough for the wrap so that helped.
Both of mine liked white noise. We have a Euan the sheep who is essentially like a member of the family now.
ikea bath, ikea high chair, ikea face cloths . . .
breast fed baby - the next to me was a revelation. Brilliant. Loved it. It would have been fine for my other wee one as well I think.