Greeting, I think it would sound better if you write it in this way;

Change

As we known <em>know</em>, English is an important language. Everyone wants to learn it well. I also want to improve my spoken English. <em>But the bottom line is</em>, it's <em>always</em> difficult for me to pronunciate every word into <em>the</em> right pronunciation. What I really want is, to become <em>being</em> a good speaker. So my dear friends, could you please give me some useful advice ?

Good luck :)