How to install Japanese and Chinese fonts?

Hello.
I've been trying to install Japanese and Mandarin Chinese fonts, but to no avail. I ran these commands:
Install at least one of the below IMF (ibus comes by default on Ubuntu):

sudo apt install ibus
sudo apt install fcitx

Install at least one IME for your IMF (mozc comes by default on Ubuntu after install the japanese language):

If you chose ibus run one of these commands:

sudo apt install ibus-mozc
sudo apt install ibus-anthy
sudo apt install ibus-kkc
sudo apt install ibus-skk

I installed all those, no clue what the last two are.
I got the Mozc setup and Anthy dictionary, but I have no idea how to make them work and how to actually change or add an icon for my keyboard. I have no idea what I am doing here. Please help :) Also, no idea what type of input I should use for my keyboard.
And how to print screen so I can show you?