The answer to 'how to install skylight' is to first carefully measure the opening in your roof where the skylight will be placed. You'll need to ensure the skylight fits properly and that there is adequate structural support. Next, you'll need to cut the roof opening, install the skylight frame, and properly seal it to prevent leaks. This is a complex task that requires carpentry skills, so it's generally recommended to hire a professional roofing contractor for this project.
Proper installation is critical to avoid leaks and other issues, so calling in an expert is the best way to ensure the skylight is installed correctly and safely. They will also be able to advise on the best type of skylight for your home and climate.