There will certainly be those who are out of work, such as lawyers and doctors. Or, maybe there will be a different kind of medicine or legal work to do.
What is it going to be like? It is going to be like this world but without sin. There will be trees, rivers, fish, birds, animals, and redeemed human beings who are going to live forever. I think we will still be engaged in making, exploring, and understanding the world. We will be engaged in ethical science, art, composition, music, and all kinds of things.