Should I sell on Amazon?

I’m inventing a new product that will be ready to launch some time later this year. I’ve been asked by some people if I’ll sell on Amazon. I am very hesitant based on hearing other people talk about experiences as sellers… Someone I know said Amazon takes 50% of the earnings from the seller. And I think you have to pay for return shipment and eat the cost of the returned item? Overall I’ve just heard things that indicate they aren’t good at all to sellers. But I’ve also had people encourage me to do it anyway simply because the platform is so big and powerful. General experience and advice is appreciated.