How can I change the default shipping option in my online store?

We have a store pick up option (free) and a delivery option (paid)
Store pick up is the default choice (I assume because it’s the cheaper of the options)
Does anyone know if there is a way to change the default shipping option to the more expensive option.
Several of our customers are not noticing as they check out that store pick up is selected and they assume they are getting their products delivered which is troublesome when they have not paid for shipping.

Any help would be amazing!!

Thank you!