Well i have to warn you, this website will only help you if you are pen-testing (hacking) your own property...with that said. There are many fool proof tuts on WEP cracking on this site, all over the web, and just about every where else you look.
Another fool proof way of hacking is through net-bois.
Here are some tools that will be of use, simple to use, and great to start with.
aircrack-ng suit: Crack WEP/WPA
dnstrace: Map out a dns.
nslookup: obtain remote IP address for web domains
nmap: To can IP address and ports
nmblookup: Get valid HDD paths for net-bios
smbclient: Connect to open net-bios ports
wireshark: Sniff passwords and messages
driftnet: to view pictures going in and out of your network
To learn, i would suggest looking around in this site learning as you go, there are alot of experienced people here if you have your mind set on one type of "hacking" e.g. WEP cracking.