just daily practice on Hello English app..try to make notes..and conversation with your family member and friends.. definitely you feel a very positive change in your language.. and you can also visit this link for mastering in daily routine English conversation.. https://unacademy.com/lesson/learn-the-art-of-greeting-others-in-english/P9451222

oh yes I got to know about them in this sept.2020 and now I am completely go gaga for them #weareone.