1. put "N/A" here, do this for all fields in the entire application that don't apply to your situation, they are picky about leaving fields blank. For part II #18 "occupation" you could put "full time college student" here
2. I checked box 5d, same situation as you this was my first I-129F
3. In her country do they use roman alphabet like we do in the US? If yes then you put "N/A" for all these fields. For example, my fiance is Filipino, in the Philippines names are spelled using the roman alphabet. But say your fiance is Chinese, then you complete this part using the Chinese alphabet!
Great DIY video for completing the I-129F, highly recommended: