Search for how to remove the Ignition switch and there will be write ups on as you have to remove the steering wheel to access the switch. But here is a quick list.
If changing the Ignition switch as well if not ignore this tools list.
Its simple but you will need to go to Napa or an auto parts store and get a GM style lock plate compresser like this but cheaper (| Tool Professional
). You might be able to rent one out from a auto parts too. The other thing to get or borrow is a nap ring pliers possible with interchangable tips ( they are inexpensive at some parts store). You can probably do it with out the pliers but just makes it easier.
1) pull horn button ( this comes off with your fingers)
2)remove steering wheel nut (might have to remove the 3 screws for the horn assembly, I'm sure I did but I cant remeber if you need to. Once you are in there you can figure out what is needed)
3) use steering wheel puller to remove wheel ( or just wiggle it around with your hands really well, use just a little penetrating oil if you want. It can be a pain if you dont have a puller with you!)
If you are changing your Ign switch as well...
4) use a lock plate compresser to release the snap ring on the lock plate. (snap right is on the shaft at the bottom and can sometimes be a pain to get off w/out the right snap ring removal pliers,