Yeah I’m trying to figure out how to prepare but it’s unclear to me what sort of basic prep works here.

Presume that you and your family will get the flu. Presume that the likelihood of you getting the flu from interacting with the public will go up. The ball pit is probably a no-go. The grocery store is probably fine. Minimize moshpits.

Basically seems like we all go on as normal and some of us will die not much you can do.

Mortality mode is pneumonia. Be well-rested, be able to avoid shocks and be able to keep up your nutrition and you will likely survive.

Basic service like medicine will probably get all fucked so save your antibiotics

It's a virus. Antibiotics are ineffective against viruses. They are useful against secondary infection brought on by compromised immune response but in general, flu care is palliative care.

but beyond that and maybe a month of food what do you do?

Expect to get sick and expect to get better. The issue is not that the world is about to get incapacitated, it's that the world is about to go on sick leave. Might be an extended sick-leave. During the 1918 epidemic, some schools closed for a day, some schools closed for two weeks, a very select few closed for longer.

https://www.healthaffairs.org/doi/full/10.1377/hlthaff.28.6.w1066

Maybe stop investing in real estate but it seems like the developed world might see third world death rates from this one. Areas with high birth rates might come out ok as its business as usual for them

Well now you're just being alarmist. It isn't the plague, it's like a bad case of flu.