If you don’t want anyone to edit pages you can lock pages so only you, admins and mods of your wiki can edit it.

You're not allowed to lock every page on the wiki either.

That wouldn’t be a good choice considering how users will eventually find the wiki and will be disappointed to see that all of the pages are locked from editing.

Ya that to, but you can lock some pages then unlock them when your finised.

Protecting a page depends on what it’s used for:

• If it’s occasional vandalism, a short lockdown is best
• If it’s more intense vandalism / spam, I would choose an indefinite lock
• If it’s important to admins (policies, staff list, etc), the same as above would apply, except it can’t be accessed by non-admins

If the original poster doesn't read this or reply, most of the replies aren't worth doing.

Oh! Sorry for the late reply, I didn't receive the notification till now. 
I just know that it is a Violation of Wiki Creation Policy, thanks for telling me that! 

I'll just try as hard as I can to fill my empty wiki as soon as possible then, but still thanks for the replies you give me, I really appreciated it! ^^

Wikis are collaborative projects, so if you want to build it up, you should spend some time trying to attract some editors to help build it up.

Okay! Thank you for your suggestion! ^^

As a side note, there are plenty of incomplete wikis out there. You could leave a visible message on the home page and other unfinished pages notifying anyone who stumbles by that "the page/wiki is incomplete, you can help by expanding it".

That's another thing to note - because wikis are public, anyone who comes by can help you expand the content, as opposed to your initial idea of cornering yourself off and doing everything yourself. But yeah, good luck, gotta start filling that wiki then.