May i suggest that you check the fuses as an initial check.
Then carefully spray all the joints with a silicon lubricant.
Make sure that the car is parked with the sun on the hood. The original canvas hoods are notoriously stiff at lower temperatures and can prevent the hood from opening.
When the hood feels warm and flexible to the touch, you can try retracting it.
If, as other posts have advised, the windows drop, the pax seat back moves forward, the rear cover retracts but the hood doesn't move, then it can usually be a hood retraction motor issue.
If you can get someone to do the footbrake/hood retract switch routine, you can stand by the pax side open door.
Then head in the rear of the cabin, listen if the motors are running. You can also put your fingers on the hood frame and feel if there is any vibration.
This will show if the motors are running, if they are, you may need to service/replace them.
If the motors aren't running, then it's probably a switch sensor problem.
Hope this helps