I'd return the newborn box and go with smaller packages. At least unopened packages can be returned if you don't use them. I used less than one jumbo pack of newborn diapers between BOTH of my boys (just over 8lbs at birth) so a box would have been a huge waste for me. Others use newborn dipes for months; until your baby is here, you won't know which camp you fall in.
I'd also stick with the single box of size 1 dipes for now. It's not like it is hard to get out and buy dipes once you know what works for your baby. Even brands are different - we had good luck with Pampers in small sizes but not Huggies; once we hit size 3, it switched.
Even wipes can be tricky! DS1 had horrible reactions to wipes due to sensitive skin so we had to try different types before finding one that worked for him. DS2 does not have the same sensitive skin so we've been able to use any type of wipe on him.