Didn't see a December 2019 thread started so here it is. Congratulations on the submission of your K1 visa application. This forum will be very helpful to you through your visa process "journey" as we call it here. If you have not done so yet please fill out your time line as it makes it easier for other VJers to assist you if you should have any questions later on during your journey.
Best advice, is remember why you have submitted your K1 application and do not set very high expect