No one ever learned a new language without making mistakes. When we start learning a new language, we are like children. We have to try new words and see if they work. We have to be free to experiment. You are always going to make mistakes. Try to enjoy the process and laugh at yourself once in a while.
This piece of advice comes from my own learning process. Once Russian is incredibly difficult for foreigners, speaking without making mistakes is nearly «impossible». However, making mistakes and laughing at them is much better than keeping silent and seeing no progress.
Языковая программа для учеников начальных классов (1-4 класс)