We listen to as many authentic native speeches, conversations, sample exams and songs as possible. Listening is the key for your speaking. I consider this the most important skill at the beginning.
Read your favorite English book, read the news on the internet and read whatever you want, whenever you can. This will be the key for your writing. I’ll give you interesting newspaper articles and sample exam papers.
I believe in correct grammar and I believe it is essential in your everyday life. We make mistakes, even native speakers make mistakes, so you don’t have to be constantly anxious about it, just be aware of it.