Leaving all that I had in my country, and reaching out to an unknown place where the culture,biodiversity, language, and specially the education are completely different made me think that it would be hard to get used to it and that I was going to take too long.
... I think you may have refereed to the demographics by this word (biodiversity) because biodiversity refers to the variety of plant and animal life in a particular habitat that has less impact on your personal or day to day life. The demographics refer to various aspects of people such as age, life-style, ethnicity etc. which has more relevance with this idea (in my opinion).
I felt very fortunate of having enrolled the school where I am studying now because I was well received by
teachers and classmates.
I've never been never aloneI never felt alone.
I've never been never alone; I always had the support, company and help of these people who were witness to what I have achieved. Because I entered school two months after it begun, my school counselor told me the day of my enrollment that my credits of the first semester would not be valid, but I could be able to go to school anyways so I could adapt to it and do well in second semester.
Well, you mentioned adapting to new environment was the most arduous challenge... But these lines do not support that idea!