But where do we store the energy is the question. Without storage renewables aren’t that useful.

That's probably propaganda from the oil company. They try to slow down the adoption of renewables by making it look harder than it is.

Fact is: You can start deploying renewables immediately. Every kWh that comes from solar does not come from coal, oil or gas. That is a win. Install renewables first, think about storing the excess power later. That is the best way to go!