It is a lot of reading, a lot of forms, and nerve-wracking interviews so I understand where you're coming from. But now she has a green card and it's a huge weight off our chests, great to be able to live a normal life. No one is coming for legal permanent residents, especially by marriage.
Almost everyone we interacted with along the way (except for the border control at PHL) was pretty friendly and just doing their job. No one seemed to have an axe to grind against immigrants.
The best resource I found was VisaJourney which has guides, timelines, useful forums, crowd-sourced processing times, etc.
I'm sure you'll find other users there from your partner's country so you can get a feel for what the process is like from a relevant perspective.
Here is the process/timeline for a fiancee visa: http://www.visajourney.com/content/k1flow
Happy to help if you have any questions