Hello!
First thing first, Welcome to Vietnamese language.
It's considered as one of the taihen muzukashii language to conquer like Japanese. But you don't be worry, I can learn Japanese, so you can learn Vietnamese too. we can start speaking it from day ONE. That means that, we focus on speaking, yes! SPEAKING.
I will give you a page which contains a short-sweet list of most frequently useful Vietnamese phrases. You ALWAYS open it on your PC, then I could ask you about things in your normal days ( NEVER PRIVATE things). Maybe about the book you like, which chapter of the book...
Okay, enough for introduction, just ask me with your introduction that you want to learn Vietnamese.