I can not speak english properly
Speak with people more often. Watch movies and videos to help you learn more quickly
Based upon this thread, you speak better English than a lot of people I know; they only speak English.
An example of a TED talk (from TEDEd / educational side): How simple ideas lead to scientific discoveries (Adam Savage): https://www.ted.com/talks/how_simple_ideas_lead_to_scientific_discoveries/details "[he] walks through two spectacular examples of profound scientific discoveries that came from simple, creative methods anyone could have followed..." Adam (well-known from MythBusters) has a lot of experience teaching by example but he may speak a little quickly. The YouTube app was recently updated and it can slow videos down: https://www.youtube.com/watch?v=F8UFGu2M2gM
i would suggest you to learn it. it will help you a lot in future. use something like duolingo. btw dont get down by this you can still do a lot.
thanks to your suggestion
u can also watch TED along with movies as described by @apoorva