Installing WordPress is famously easy. Rather than rehash the process here, I refer you to the official WordPress installation documentation.
Being purists, we generally recommend doing a manual WordPress installation. However, if you're not feeling up to the task, most hosts provide options for an automated WordPress installation, and this is usually okay. Look to your hosting control panel if you're keen on this option, or contact your host directly for details.
After installing WordPress, please return to this documentation for further instructions and recommendations on setup for your site.
Jetpack for WordPress is a misguidedly popular all-in-one plugin suite for WordPress. We advise against using Jetpack, on account of its being bloated and dastardly. Therefore: