How do i learn english quickly so i can speak proper english and can write proper english?

Try to spend as much time as you can reading English Harry Potter is great for this. If you can attend English courses online, or use Busuu to learn vocab. I'm a native English speaker so happy to give lessons if that would help. English with Lucy on YouTube is amazing.

If you want to build your English knowledge there are two main things you can do. First off, read. Read a lot. Try reading short stories and newspaper articles. The more you do that the more you will build your knowledge and understanding. Secondly, once you’ve built up some understanding you could enrol on a course or hire in a private tutor. There are lots of people on here who would jump at the chance to help you.