How do I create a platform like Cambly but for the smart phone

Not sure if anyone here is familiar with Cambly but it is an English learning platform that allows one on one face chatting but you can also censor yourself by talking from a black screen and use the chat feature. I’d like to create an app but for another purpose and would like to know which programming language to use and how I could create an app that would allow the face chatting with chat box, black screen if wanted, etc. Just a little background about me, I have no real coding experience but would like to create my vision of making this face chatting available with chat function via an app. Any help is greatly appreciated! Thanks so much.