I finally installed Ubuntu Linux on my PC without any hassle but I cannot input Chinese or Japanese, or figure out any ways to install a Chinese or Japanese input method, cuz I'm too dumb for this shit, so I have to type in English.
@Crowchan Install a fcitx5 (with Chinese IM pre-installed) and a fcitx5-kkc/skk/mozc (Japanese), and you can get a lots of tutorial blogs by searching on the internet.