Having done axles in the past, I'd leave it up to a shop unless you know someone with the tools to deal with it. I can assume it's a front wheel drive car, and that alone requires a spring compressor or someone willing to risk a finger trying to manipulate the strut with a jack to get the ball joint back in place.
A quick run down on the process is supporting the car on jack stands, removing the retaining bolt for the ball joint ( most cars ) removing the large axle nut, dropping the lower control arm out of the way, pulling the strut off the axle ( possible need to disconnect sway bar and steering linkage ) and then you pull the old axle out. However, the axle doesn't always like to come out or may have a trick to it. You may have to pry the axle free from the transmission which involves getting under the car with a prybar. Installation is the reverse, with the added fun of compressing the strut enough to get the ball joint back into place.
It's not difficult for the experienced, but it is fraught with nuances for the novice ( that axle nut can be a real bear to get off! ).
A decent shop won't charge you more than an hour labor...maybe 1.5hrs plus the cost of the part.
If cost is an issue, sometimes you can find someone through your local craigslist that can do it for cheaper than a certified shop if you are comfortable handing your car over to someone who won't warrantee his work.