Like everyone is saying, it's a relatively simple install. I'll comment on bryanguystatus's comprehensive steps, quoted below:
1. Unplug negative terminal.
2. Unplug wire harness on rear top on headlight.
3. Remove the two 10mm bolts securing the headlight.
4. Pull the headlight out.
5. Install new headlight.
6. Tighten the two 10mm bolts.
7. Plug wire harness in.
8. Attach negative terminal.
9. Check vertical alignment.
10. DRIVE!
Steps 1 and 8 are unnecessary. If the light switch is off and the car is not running there is no power going to the headlights, and even if there was there would be no problem with pulling the plug.
Step 4 - Pull the headlight out. Not always as simple as it sounds. There are two plastic 'prongs' on the headlight that snap into rubber sockets. These can be stiff to remove. Best to get your fingers behind the headlight, near the sockets, and push the headlight out. Then once the headlight is loose it sometimes is difficult to get it out past the fender projection point. Some people recommend putting masking tape on the car around the headlight to prevent scratches.