I do these things all the time and believe it or not it can be extremely simple. Here's the catch, you need a axle nut socket, maybe a two jaw gear puller if your shaft is stuck in the splines, and a few basic tools. If your components are really rusty it can be difficult. Buy a Haynes repair manual available at most book stores and chain auto stores (autozone, advance auto parts etc..about $14.95) You can also borrow almost any tool, no charge, at autozone if one is nearby. I was in your situation a few years back and now I can tear down a Subaru no problem. Oh, almost forgot.. if the manual or anyone tells you to remove the balljoint or tie rod, you don't have to. Turn the steering knuckle all the way to one side and push the axle all the way in. There is plenty of clearance. I get my remanufactured cv joints for $60 w/ a $50 core charge at advance or autozone. Also make sure you don't get any dirt or grease in the wheel bearing area. Work slow and careful. YOU CAN DO IT! GOOD LUCK!