24 weeks pregnant - how prepared should I be?

ElleWithEndo • 6 IUIs, IVF (chem preg), FET, lap surgery for endo, another failed IVF...and now surprise BFP!⭐️Instagram: ellewithendo
I have such a long checklist of things to do to get ready for baby. I just can't tell if I have a while to get them done, or if I should be hurrying up! I have done a lot of research on baby stuff but I haven't purchased anything yet.
When do I need to have everything ready by? At what point will I start feeling so tired/humongous that I stop being productive? My due date is June 28.
And lately I've also become so worried about everything: Zika, preparing for childbirth, if/when we should have a baby naming ceremony, when our families should fly in to help out, if the baby is healthy in there, if I'm missing out on certain aspects of preparation I just haven't thought of...I'm not usually an anxious person so this feels new and it's emotionally exhausting! 
Your advice/experience is welcome.