Could you please help me to correct it? And if you are a native speaker , could you read it ? I really want to be your friend. I like playing tennis and swimming in my spare time. When it comes to learn English, I believe the most important tips when learning one thing is to spend enough time and concentrate on it. Malcolm Gladwell came up with The law of 10000 hours. Which means at least 10000 hours is needed to establish expertise in any area.