If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

Freedom of speech does not apply to:

Fraud

Revealing classified information

Is there anything you did that you regret? If so, what is it, and why?

No freedom is absolute.

False advertising

That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

Would the word literate carry the same meaning with public (common wealth) in 1900 vs today 2020?

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.

Trade secrets

And much, much more.

Why do people procrastinate and how can they stop?

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Revenge porn

Insider trading

Teen girl from 6,200 years ago with cone-shaped skull unearthed in Iran - Phys.org

Perjury

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Insurrection

Journal tells author its retracting three papers for concept that ‘violates’ law of thermodynamics - Retraction Watch

Conspiracy

HIPAA violations

Child pornography

How should I go about convincing my mother that my foreign online boyfriend isn't out to get my holes or scam me?

Threats of violence

Terroristic threats