What Linux? - Newbie Needs Help

Hi.

I was reading these forums and how-to for like 1 month now. And I feel like I want to try some things finally. But I have Windows since my first computer days so I don't really know much about what Linux should I download. I see there a lot tutorials for Kali 2.0 but should I as a newbie download that?

Or what Linux should I download? when I'm just starting and I want to try things like getting Wi-Fi passwords, trying to hack one of my emails. Trying to hack into my second PC and stuff like that...

Please don't shout on me if I'm pissing you off, save your time and ignore this.

Thanks for all helpful comments and sorry for my bad English.