Grammar is important. It gives you the basic foundation for communication. But some people focus too much on grammar, and it can lead to problems. For one, they might be afraid of making grammatical mistakes, and they may speak very slooooowly. But making mistakes is ok, because (1) is impossible to avoid grammatical mistakes, and (2) we learn from our mistakes. Another problem in focusing too much on grammar/vocabulary is that -- even if you are very good with both -- they will not be enough to understand native speakers. When we (native speakers) speak, we pronounce things in sometimes strange ways. So, the more you speak and listen, the more you will improve your ability to communicate. And the more you speak and listen to native speakers (and copy the way that we speak), the more you will understand native speakers. The only way to improve your confidence is by... speaking. At first you might be nervous, but the more you speak, the more your confidence will grow.

Try to think in English. Start with ordinary things, like, "I have a book" or something. Then go to express your feelings, or think about your day. It will help a lot. Of course, grammar, listening, pronounciation are important too, but you should learn how to use English without thinking: "Which word should I choose or what s a grammar rule i should use here?" Also, you should write your thoughts as often as you can. Put more entries here, on italki.