Do you say: «I am a student OF Minsk State Linguistic University»? This isn’t a mistake but for native speakers it’s more natural to say «I’m a student AT Minsk State Linguistic University»
Do you say «the English language faculty?» It’s better to say «the English language department«, especially for Americans.
Don’t say you are «taking a course«, when you study more than one subject. Say «program» instead. By the way, both program and programme will do.
It is widely considered incorrect in English to begin a sentence with a conjunction. So, don’t start like this, «And I am proud of him». Say, «I am...»
It might seem a bit unnatural to say «while at the same time», but in modern English these conjunctions are often used together to denote two independent actions happening simultaneously, » … while at the same time he’s working for EPAM systems’.
These are my notes from Lang-8.