I lived in UK for a while and then moved to the US and for me personally I felt I could blend in more in the US than in UK, so that raised my comfort level considerably and I gained my confidence thereafter. I don't think it is the place that determines your achievements but your own persuit in life. No matter where you go if you don't know what you want in life things won't be much different, but if you have set goals and are willing to work hard to achieve them I would definitely reccommend the US as there are opportunites galore if you can tap your resources. When i first came here i met an interesting person who told me " America bhaneko Mathura ko peda ho Khayega bhi pachatayega na khayega bhi pachatayega." In the beginning I could not make anything out of this famous Hindi proverb but the more i ponder the more meaningful it gets. So good luck in your venture and hope you prove to be amazing in all your undertakings!!!!!