Please to all nairalander in the house lot of things have been bothering me, which i will like to share with you all

i am currently a 200level student in one of the universities in Nigeria, studying statistics i have always hope to work in U.S.A as a lecturer or any firm but the problem is i dont know how to achieve this dream, am also thinking of applying for schoolarship after my bsc to further with msc in statistics but am currently using two sittings in my o level result.please advice needed