RIFFAT said:
WHICH IS THE EASIEST WAY TO CHANGE THE ACCENT
You should find a teacher that can tell you about English stress and intonation patterns. Linking is something you should ask a teacher about as well. Vowel sounds are often a lot shorter in other languages. Work on stretching out the vowel sounds on the stressed syllables. You should find a teacher that can help you approach this at the sentence level.
Words are strung together in English to form typical pronunciation patterns. These patterns change when we speak sometimes in order to give extra meaning to what we say.
Generally, English has falling intonation, whereas many other languages have rising intonation. This would be at the end of words, phrases, clauses, and sentences.
I would find a teacher who can help you understand these things. There's more to it than what I can type here.
Do people ever have a hard time understanding you when you speak English?
Using some relaxed informal pronunciation would be of some help if you are living in an English speaking country. I would look for guidance in this area from someone whose first language is English. You should know, however, that different people have different views where this is concerned. It would seem that I have a more "liberal" view of this. I teach, and I advocate teaching, informal/relaxed/colloquial pronunciation. It really is part of the reality of speaking English.
Also, find out about "schwa".