I say that because k1s are taking on average a year.
You might want to consider getting married and filing for a CR1 instead. So many advantages.
For example, a K1 is more expensive because your (then) wife will have to file for adjustment of status. Currently the fees are $1,225 but they are increasing them soon. Surely before your fiancée adjusts her status. all that to become a permanent resident, which she would be right after landing if you guys filed for a Cr1.
Also, with a k1 your fiancée won’t be able to work or travel internationally for 8-9 months.
About your questions, I would hand write the form. After all, if I’m not mistaken, you will mail that in, correct?
And the dates, you can certainly write N/A