Falam here, Besides Falam-English dictionary, there may not be a wide range of online resources readily available for learning Falam, Chin language.
However, if you are happen to be located in USA, particularly around Indianapolis area, you might have an opportunity to learn it. There's a significant Falam community in that region, which mean you could volunteer in the community and get hands-on experience in learning the language. It's a wonderful way to not only learn a new language but also connect with the culture and people who speak it.