im new to this Homebrew stuff,please help

hi,im new on this stuff and i have a few questions about how to unlock the Wii:

-what i need to unlock the Wii??
-whats the features i will get by unlocking?
-i have a US Wii,can i play (original games from other regions like Japan NTSC/J games) after unlocking the Wii??
-can i play all the backuped copy games from US or Japanese games?
-is it safe to install those hacks to the Wii?,what if i mistake in the install process? can get bricked?
-can i uninstall those hacks?

the main reason i want to unlock the Wii is that i want to play original games from Japan NTSC/J,and i really dont know if those hacks made it possible so i need help on this,thanks

Do not talk about backups on this forum, please.
(see the rules)

oh sorry i didnt knew

Double posting topics is both annoying and disrespectful like your disregard for the forum rules.