I'm an old guy and was given a Vision 2 to start my vaping journey. I have been reading that coils need to replaced quite often in vapes, but when I go to shop nobody could tell me what to order. Finally one person said since I am using pre-filled carts they have coils built in and the Vision Spinner 2 does not have a coil itself, Is this true? Does the Spinner 2 have a coil? I plan to use the pre-filled cartridges while I am learning for now. Again I need to understand this whole coil thing.