Sis every surah is beneficial, I know one thing for sure that if you are praying for something big one of the most beneficial namaaz is "Saalat'ul Tasbih. if you don't know how to perform it inbox me i'll teach you.
as a muslim sister I would like to advise u not to think about making a prayer for making this process easy but always ask for what's best for you, cause that's what we all have to do. I mean this processing time is hard for all of us, but if u think about it, there's a reason behind something you get from Almighty.
I hope you don't misunderstand me I am just trying to help you