What you need is not only good command over the English Language but also good command over english Pronunciation. That will help you to take yourself very close to the level of perfection. You should take more practice sessions to make yourself familiar with the pronunciation.

1. Diphthongs
   
2. Nasal Cavity
   
3. Pure Vowels
   
4. The Affricates
   
5. The Plosives
   
6. The Fricatives
   
7. The Nasals
   
8. The Laterals
   
9. The Semi-Vowels