How do I start publishing on Amazon KDP?

I’m new to self-publishing and curious about how to get started with Amazon KDP. I’ve heard a lot about Amazon Digital Publishing, but I’m not sure where to begin. Do I need special formatting tools? How do I set up royalties or choose keywords? I’d love some tips or a beginner-friendly guide if anyone has one. My goal is to publish both eBooks and paperbacks eventually. Any advice from experienced authors or step-by-step resources would be greatly appreciated!