I am not a teacher, but to me, the letter looks good - I made a few small corrections.
Hello,I am from Bulgaria and I want someone to check my letter:
I am a friend of Gergana Dukova from Bulgaria. I want to study
in[at] Prague c[C]ollege and I have already chosen the program -fine art & experimental media-BA[capitalize]. This year I'm getting-[a] -[B]achelor['s] degree and my last exam is in June. I study music in Sofia University[do you study music now or studied in the past?]. I hope that I can start study[my studies] in Prague in October. I am aware of the conditions for application, but there was anything new, which I heard, when I went for information of the exhibition in National Palace of Culture.[not sure what you mean by this sentence - are you asking if any changes have occurred?] You require a portfolio.I have some questions about the required portfolio:
Do you have any preferences as to how
to look like[it should look]?
Can[May] I send you some links to websites [which include my] photography?
I also want to know if there is any option to
borrowing or to receive a scholarship.[to receive a loan or scholarship]
I intend to take the TOEFL test this summer.
I am very grateful to your colleague
that[who] gave me your business card to be paid directly to[allow me to contact] you. If you have any questions about me I will answer you[Please let me know if you have any questions about me that I could answer].
Thanks in advance!