My Gen 3 Kindle Paperwhite still worked like new, but newer versions called to me. I chose the Gen 10 Paperwhite after comparing models and types, but what you'd choose depends on your needs and wants.
Some accessories are semi-necessary such as covers, others might be mandatory for your situation such as a charger. And then there are the simply nice-to-have accessories.
You know the types of books you enjoy reading and want to find more of them, or maybe you're itchy for something different. Book lists of all kinds are just waiting for you.