As first jobs in a big, new city go, one whose job description involves a crash course in American accents to sell car loans to those Americans ranks among the most interesting. When done in the dead of night in Nairobi due to the time difference makes it even more so. Off a bus from Nyakach, in a t-shirt and jeans and with no CV to boast of, Evans ‘Dims’ Ouma did just that. So good did he get at his job and accent that when a customer could not discern what a phone marketer in a fourth-floor room in downtown Nairobi was saying, they were instructed to say, “Let me put you through to my superv…