Sometimes just clicks when try to start

The main thing is I "hope you learned something." None of us knew this "once." When I was 16-18 I was already getting fairly good at some electrics and electronics. I was a licensed radio amateur by Jr in high school. Joined the Navy in 68 (they tried to draft me) and got ET electronics training.

But there was no internet, and if you wanted wiring diagrams you went to the dealer and ponied up for the factory service manual. There were "Motors Manuals" which were poor on the whole car.

Learn a bit about troubleshooting. It never hurts. If nothing else, might keep you from getting ripped off.