My #2 is 1month old,with big sister being 5. :)
Swaddling- the new "rule" is that swaddling is still good, but you ant to leave the legs loose or swaddle them with the legs bent in a "frog" position to keep the hips in proper position.
Bumbo seats- the thing with them is that they don't provide the needed support for Baby's back, and pretty much makes them sit upright before they are ready... It also means they are not otherwise in a position where they can develop the muscles they should be working on. People were putting them on counters and stuff, and babies got injured falling from them like that... But that's a parenting issue, not a product one. Lol.
Personally, I think things seem to be in a constant flux... So I just take it into consideration and do what seems right to me. My son hates being swaddled, so I tuck the blanket around his belly tight enough so he can't pull it up over his face, then leave it loose over his arms and legs. Of course, I also bed share against general advice when he's having a rough night. I'm not a huge fan of bumbo seats, even before "they" started advising against them... So that's a nonissue for me.
I downloaded the "what to expect" app, and joined a forum of mothers due in the same month as me. I quite like it,because we all have babies at the same developmental stage, so we are all concerned about similar issues. It has other"boards" based on topic (breastfeeding, gestational diabetes, preemies, etc.) maybe this app would be a good one for you to look into?