Adichie's insight and her observations on two cultures

About 1/4th of the way through Chimamanda Ngozi Adichie's Americanuh (2013) as her protagonist , Ifemelu, leaves Nigeria to begin postgraduate studies in the US (the novel actually begins w her 13 years later as she is a successful academic or writer living in Princeton, w most of the first 100 pp or so giving us the back story). Her Aunt Ulu (so?) picks her up at the airport and brings her to her apartment in Brooklyn, where I is to live until she begins her studies in the fall. Most of this "arrival" section concerns I's first observations on american life - a double vision of sorts in that I is observing the new culture w the perspicacity of a field anthropologist as well as observing the various ways in which her aunt has changed as she adapts to American life. These observations are I think what has made Adichie a world figure. She has a sharp eye for detail in writing about her immigrant communit and uses this precision to tell not only an immigrant's tale but also as an aid in her cultural dissection of America: the way we talk, drive, raise children (her aunt has a 5year-old son, Dike), what we and our children watch on Tv, how we shop and how we eat, and, as to the immigrant community, the need to assimilate, to advance in career, to impress those who have stayed behind, to adopt American mannerisms, to put the best face on everything, and to play the game, so to speak, for ex., to get I a job her aunt gets her an ID from a fellow Nigerian who'd returned home, so I now has a new name like it or not (oddly the first name is Ngozi) so there's a sense of us against the system, doing whatever it takes, this is America (and Nigeria as well). So - I'm getting insight into a new culture but I'm not caught up in the narrative, which is languishing ever more chapter by chapter.