How do I replace the headlights on a Vauxhall Insignia?

I have a Vauxhall Insignia and the headlights need to be replaced. I've never done it before and I'm not sure where to start. Can someone give me step-by-step instructions?

First, locate the headlight assembly and remove the cover.

Then, disconnect the wiring harness and remove the old bulb.

Finally, insert the new bulb and reattach the wiring harness and cover. Don't forget to test the new bulb before fully securing.