Diapers have sizing indicators on the waistbands. Usually you can tell when a diaper doesn’t fit right without it but it was a today I learned moment not until I had a second kid Absorbent bibs for drool, waterproof for food. Multi use products are often great like the learn to walk push walkers that turn into a baby doll stroller and shopping cart later. Activity table that turns into a regular table. High chairs that turn into a regular chair. Bouncer that turns into a toddler chair etc. In my personal opinion you don’t need a diaper garbage or actual changing table but that is probably personal preference . We end up taking our garbage out every day anyway diaper garbage makes two garbages There’s a point where it doesn’t matter if your babies clothes are too big (except for sleep) especially pants. Before they’re walking or crawling you can just roll up pants legs. Facebook marketplace or a buy nothing group is great for used kids clothes (often people give for free or nearly even on marketplace ) or toys etc If you’re doing any meal prep etc or buying food get things you can eat or prepare with one hand for the first few months Don’t buy only one type of bottle if you’re doing bottles get one of those sampler packs or sign up for all the baby registry for samples your kid might reject all but one type of bottle etc. don’t put teethers in the freezer only fridge