My country

My name is Ruslan, and I’m a research assistant at the National Art Museum in Minsk. Minsk is an interesting city with many soviets architecture, for examples, buildings on the Independence Avenue or National Academic Opera and Ballet Theatre. But I’m not from Minsk, my parents live in a small city Rechitsa. I’m from this city. Rechitsa is a very greenery and clean, it stays on the big river – Dnieper. I love it here. The countryside in Belarus is a very beautiful too – the rivers, the forests, the clean air – really very nice. The weather of Belarus is good all year – not very hot in summer, not very cool in winter. I love it country!

My country

“Pryvitanne”, that's ("that's" works if you are aiming for informal writing only. In formal writing, "that is" works best. Formal writing should not possess contractions. Contractions would only be used in spoken language) hello in my country Belarus.
My name is Ruslan, and I’m a research assistant at the National Art Museum in Minsk. Minsk is an interesting city with many plenty of soviets architecture; for example, the/many/several buildings on the Independence Avenue or National Academic Opera and Ballet Theatre. But I’m (I am) not from Minsk originally [this word, "originally", does not need to be added, but it does make the writing more precise]. Still, my parents live in my hometown, a small city called Rechitsa.  Rechitsa is full of greenery and very clean. It is situated/positioned/located on the big river Dnieper. I love it there. The countryside in Belarus is a very beautiful too/also – the rivers, the forests, the clean air – all are really very nice. The weather of Belarus is nice/pleasant all year – not very/extremely hot in summer, not very/extremely cold in winter. I love this/my country!

Great job! It was really a pleasure to read. You really give the reader a sense of the atmosphere. 

Keep up the great work!!!