2. Be prepared to have whacked up sleep and day schedule, if you are working from home. Kiss goodbye to deep focused sessions, unless pt.1 and you have some sound proof room and a willing partner to split the time with the baby and work in rotations.
3. Invest in the sleeping coach to normalise baby sleeping patterns, pays off immensely down the road.
4. [Optional] Schedule regular visits to pediatrician or family physician (if it is acceptable practice) to monitor baby development. Not really for the baby, but more for your peace of mind. Each baby development is unique and having a voice of authority saying it's ok to have, say baby roll not in 3, but 6 months is relieving.
5. Be mentally prepared to get fat (both partners).
6. Do not rely on your parents, even though they would want to help, they have their own life/ commitments and do get tired rather quickly. Also, they have their own ideas on how to raise a child, which is guaranteed to clash with yours, potential source of conflict. Be ready.
7. First 3 months, you probably would feel irritated constantly, so plan (if you are a planning guy) in advance the consumables - like diapers, cloths, crib, pram, bath things, lights, white noise and frontload on them in advance, to save the time later. Also, I wish I could tell you to have open and ongoing conversation with your partner in case of conflict. Reality is you would not have time nor right right attitude at that point. So both of you remember, that you have willingly signed up for this so time to sober up and pull through.
After ~6mo, things would get easier, it's actually a joy to watch kids grow. So hope this helps& good luck!