How can I learn High Valyrian without some google translate and keyboard ???
Without google translate: No need to use it. High Valyrian is pretty easy. In this course, they just teach simple words and sentences. Not as complicated as Vietnamese :)
Without keyboard: No need a separate keyboard just for learning this language. In some cases, they give you options for letters like _ ñ, ĩ, ã,... Other cases, they still accept letters like n, i, a.