Help in vocab

Hey guys so I can speak Hindi fluently from a young age but having been brought up in English speaking places so more often than not, I tend to speak Hinglish. This is fine for the most part but it bothers me at times since I want to know how I can expand my vocabulary. My reading is fine but slow.

My main goal is to improve my vocab whilst speaking and read a bit faster(which is secondary).

Thanks :)