You don't have to do anything to prepare. You don't have to move preemptively or worry about food production. Climate change is not a 80 year apocalyptic concern, you will be long gone before the dire consequences are reached.
Nothing changes until everything changes all at once.
Civilization has a huge, but not unlimited, ability to withstand huge shocks.
Climate change does many things. More intense and frequent storms. More droughts. More floods. More firestorms/forest fires. More hurricanes and tornadoes.
All of these things stress systems.
Which systems can withstand an ever increasing ramp up towards more stress and shock?
Which systems can't? Will the ones that can't take down the others through a chain reaction of refugees and mass humanitarian crises?
It's way more complicated than "don't worry for 80 years".