Supernova

I just had the ol' carswash antenna accident that seems more common than it should be. I bent \ broke my antenna on my '02 im 99.9% sure the motor is fine (for now) and it does go up and almost all the way down... but I need to replace it... here's MY unique dilemma. Previous owner installed modern Bluetooth \ Carplay \ Nav etc where the old cassette and DVD area was, so I cant do the 'trick' posted earlier in this thread by holding down buttons... I have no stereo to do that with anymore. Whats the best way for me to have the replacement installed... im NOT very 'handy' so unless its simple id take it too a dealer or mechanic to do it but dont want someone to rip me off on what the actual labor to do this would run me. Just got my Silver SC 2 days ago and snapped the darn thing right away. Uggggghhhh