Can a .org website be used like a .com website or are there restrictions?
The name of your domain, nor it's suffix (The .org, .com, etc),
will not effect your actual website.
But it will, sometimes, tell users what your website is about,
or what it does.
The domain suffix "org" was intended for use by organizations,
such as charities, as "com" was intended for commercial use
(Although "com" has become the popular domain suffix name - It's
intention has likely demolished).
But don't be fooled - Any website may use "org" or "com" freely.
Having an "org" suffix on your domain does not require you to have
a organization of any sort, and so on.