how will you learn to speak high valyrian
Try the Duolingo High Valyrian course on memrise. It has audio for all the duolingo vocabulary.
I don't know how I am going to learn how to speak the language when they don't say anything
At the moment I'm just working through the exercises with the plan that once I've got to the stage where I can have a simple conversation, I'll hit the communities more and use it in discussions.
I didn't know about Memrise, so I'll probably start using that.