Hi friend,
Always remember - Perfect practice makes men perfect. Therefore, you need to start from scratch instead of directly jumping onto newspapers. Don't get disappointed; it takes time to be perfect.
Unless you have a grammar foundation, you can't speak or learn English. In order to learn or become a master, you must have a strong foundation in whatever you do (in your case, grammar).
Keep on practicing until you feel satisfied. Observe professional English masters and newsreaders, the way they pronounce each word. Also, try to speak in a neutral way rather than putting on an artificial accent. Open your mouth wide so you can speak each and every word clearly.
Useful tips:
- Practice the S & SH sounds (e.g., save or shave) - this is very important, so practice it properly.
- J, Z & ZH sounds (e.g., cousin (Z sound), exposure (ZH sound)).
- Soft TH (thank, Thursday, etc.) or hard TH sound (that).
If you still have any problems or queries, write back to me. All the best in your endeavors!