Q: Engine doesn't wanna warm up

You should have the vehicle checked to see if the engine is not running hot enough or the coolant sensor is not reading the correct temperature causing an incorrect gauge reading from the engine actual temperature. If you have already made sure the fan clutch spins all the way around freely and when started cold and engine is brought up to 2000 rpms your fan clutch may roar for a minute before going quiet. If the fan clutch stays roaring and does not quiet down then it is sticking engaged and should be replaced. If the thermostat is closing and opening correct and the fan clutch is locking and releasing the way it is supposed to then you will need to have the temperature sensor checked and replaced. If you need additional assistance then have a mechanic like one from YourMechanic come and continue to diagnose problem for you.