Yeah, for the most part, i was born in china, came to the US and started 4th grade here. I didn't speak any english at the time (didnt even know the alphabets beyond ABCD). I am now a physician making a comfortable living after alot of hardwork in high school, college, medical school, and residency. So I am going to vote "yes", i think if you define success by having a good career, feeling fulfilled in life, being able to live comfortably, and at the end of the day you knew that you have made a difference in someone else's life (by that i mean, even if u work as car mechanics you are making a positive change in someone's life by fixing their car) then you have "succeeded".
And if you are wondering, yes, I didn't really use much money from my parents. Most of the tuition from college and med school were loans; maybe 10% of it came from scholarships. I owe the lenders $201,000, now its down to 150,000 and i am on a 10 year plan, paying 2100 a month for tuition i accumulated from the 8 yrs of schooling. So yes, if u r thinking about going back to school, there is always loans available too. (interest a bit high nowadays though, try to avoid those Grad Plus 8% if you can)