Can I purchase my own router?

Hello, I'm curious about the possibility of purchasing my own router. As someone who is interested in managing my own network and ensuring optimal performance, I'm wondering if there are any benefits or drawbacks to owning my own router rather than relying on one provided by my internet service provider. Additionally, could you provide some guidance on what factors I should consider when selecting a router, such as speed, range, and compatibility with my current internet service? Thank you for your assistance.