Drawing Hacks: How to Make Digital Portrait [for Beginner]

Hi everyone!
Quick review about my life today (you can skip this part): I totally forgot that today is a holiday! I set a meeting with my partners and boss, and she said: "Are you mad? Who wants to work on holidays?"
And yeah, because I don't have any specials things to do for today, so I made this video.

Yesterday my friend asked me to draw her and her daughter's faces. I said yes. And I was thinking, why I didn't use this opportunity to make a tutorial or timelapse video. And here it is!

Actually, I want to record my voice, but too bad. I am in my nest right now. Do you remember that I'm a catfish, right? If you don't know me, let me introduce myself again. My name is Kyu (it means nine in Japanese). I'm a Prince of Namazu Kingdom. Someday I'll be King Namazu IX. In Japanese, Namazu means catfish. So, yeah, I'm a catfish who live in the human world for a while.

So, that's not my voice. I use the "Narrator's Voice" app. It's much better than google voice, but sometimes its voice can be super annoying, especially when they put the wrong space on one sentence.

The Tutorial

You can use any kind of drawing apps you have. This tutorial would be very basic and simple. I guarantee you can make it even though you aren't good at drawing. I use "Autodesk Sketchbook". I used to download it on my phone, but for this tutorial, I use my tab.

First, open the app. Insert the photo you want to draw. Maybe your face, your idol, or your ex's new boyfriend/girlfriend (trust me, I ever did this). Then, make a new layer. Pick the brush: I use pen brush, the basic pen brush. You can pick any brush you want.

Make a new layer. Then start to push the start button on my video.

Anyway, I tried to make it as three separate sections with three different results. The inline version, the basic color version, and the light-dark color version which is more complicated.