You can visit Kiev, Ukraine by airplane and arrived at Boryspil International Airport (KBP) which is about 40 minutes from the city center. The city's second airport Zhulyany (IEV), used mostly for domestic flights, and low cost airline WizzAir, is located 20 minutes from the center.
Kiev is still largely a city where very few people know English, and the likelihood of encountering an English speaker is low, but not impossible. For the non-Russian or Ukrainian speaker, it's quite possible to get around easily, and it is a very interesting city to explore. It never hurts to speak English. Often, a shop assistant will ask customers who can speak English to act as translators.
What to do in Kiev when you visited there, you can visit many beautiful places such as Kiev Pechersk Lavra, Babi Yar Memorial, Museum Of Chernobyl, Motherland Statue and War memorials, City & Park Walking Tours, National Art Museum, Mariyinsky Palace, Museum of the Great Patriotic War, and many other places.