How to Begin a "Hack"

Hello, I am my own Administrator and I want to test the strenght of my network. So reinstalled my laptop so there is no password and nothing. So now I am out of my network and I'm playing "hacker". So what should I do? I don't know the password, I don't know the IP of the router I know nothing! How should I start?

So I begin the discussion!

I'm thinking that I can look if the network is safe with WPS/WEP/WPA2 ect. Ok it is WPA2.

I start bruteforce!

Meanwhile I'm thinking if I know somebody in the network so I probably can send him a backdoor! But no! There is noone I know. So bruteforce failed. What should I do next?

I read some "How to" but I'm not sure what I should do next because WPA2 is very difficult!

PS: Another discussion. So we are in the network as a "normal" user. How can I "hack" another user? Any ideas?

Thanks for alle comments :)

PPS: Happy hacking