https://www.nicoclub.com/service-manual ... %2FHAC.pdf
Exploded diagram is on HAC-55. The blower and resistor (VBC) are both on the lefthand side of the HVAC and both require pulling the gas pedal assembly to replace. The VBC connector can be gotten loose for diagnosis without removing anything, but it's partially hidden around the back of the HVAC housing, so you have to yank it blind with your hand in an awkward position behind the pedal. Since you haven't done one, I recommend using a dentist's mirror and flashlight to get a look at the connector, so you can see where the release is before trying to pop it loose.
The normal blower rules apply -- if the motor tests bad and the VBC tests good, you can just replace the motor. If the VBC tests bad but the motor tests good, replace the motor anyway (there's about a 90% chance it's drawing too much startup current and caused the VBC to fail, so replacing the VBC by itself will just have you doing the job again in a week or a month).