WordPress.com is a hosted platform where your website is managed by WordPress itself. It's easy for beginners but offers limited control, especially in terms of customization, themes, and plugins unless you're on a paid plan.
WordPress.org is the self-hosted version, where you have full control over your website. You need to buy your own hosting and domain, but you get complete access to custom themes, plugins, and code.
Bottom line: If you want full control and flexibility, WordPress.org is the way to go.