@Danil - I wrote an article about his here:
Hi, I am a professional Chinese teacher. If you are a beginner , you should pay much attention to pronunciation first because Chinese have 4 tones that is very difficult for foreign students. You have to often practise to master the tones. You also need to pay much attention to remember many different Chinese charaters' pronunciation(without PINYIN) . English is easy to read and you can't guess the pronunciation, even it is a new word. But Chinese characters are different. You must look up how to read in the dictionary. Chinese grammar is very important. Some grammars are easy to understand, but some are not. I hope this is helpful for you. Good luck!