HyHi...I'm Indonesian people, of course my pronunciation it is not wellgood.
Good pronunciation is essential for speaking and understanding spoken English well.
How can I improve my pronunciation?
First of all, I noticed some mistakes in your post and dared to correct them above. Take a look.
In my opinion, the best way to improve the pronunciation is to talk as much as you can with native speakers or at least with someone who can pronounce correctly. A conversation is always the best way to learn any foreign language and English is no exception. It could be difficult, especially if you learn English by yourself. If you can't do this, try listening to spoken English as much and as frequently as you can. It's not a big problem in today's world - let's say all you need is an Internet connection. Find radio or TV stations where English is used (e.g. BBC) that broadcast via the Internet. This way you improve not only your way of speaking but also listening comprehension. It worked for me.
It usually takes some time. Be patient, take your time over it!
Student or Learner