To show contrast we can use on the other hand. This is used when we have expressed one idea and we want to show the opposite point of view or argument. Sometimes, the first argument is expressed with on the one hand.
On the one hand I want to buy a powerful car but, on the other hand, I don’t want to pay for more fuel.
I would really like to have more money. On the other hand, I don’t want to work any more hours.