As a first timer expect it to be a fair sized job taking 2-3 hours to remove the front bumper cover, headlight washers if fitted, then remove the headlights which are secured with several long torx. If not previously removed they may be seized so need care and perhaps penetrating fluid
Before removing any headlight note the exact location as realignment is difficult to get correct to all the gaps and panel lines. and will need a couple of test refits to get it spot on. Rebuild is the reverse
You'll need headlight alignment checked unless you're feeling handy setting the beams against a square wall
Second time you'll do it in half the time..